Finally rediscovered your video. I'm the guy who requested the info. Upon further research I have discovered bad contact with the ecu connector and also a vaçuum leak on the driver's side. Time for the propane bottle check trick. Thanks for your videos, they're quite helpful.

@VetteSource

3 жыл бұрын

Hey buddy, glad to hear that you have been making progress and it's been helpful. Let me know if I can do anything else👍

Just saw this today and found it very helpful and appreciated.

@VetteSource

2 ай бұрын

Great, glad to hear👍.

AWESOME! I have been trying to find a explanation of these vacuum lines and routes for years. Thanks man!!

@VetteSource

2 жыл бұрын

No problem, Brian. Glad to help.

Thank you for posting and explaining this. I've been looking all over for a video for this!!

@VetteSource

4 жыл бұрын

Thanks for the feedback, glad you enjoyed it.👍

You are a life saver! I was working on my 3rd gen camaro and i noticed the dryer valve & hose were turned to shit but i could not for the life of me remember what the valve was called 🤦🏽‍♂️ thanks to you i can sleep stress free tonight haha

@VetteSource

2 жыл бұрын

Excellent, man! Glad I could be of assistance👍. Let me if you need anything else.

Man that is so Awesome , Thanks so much for the video. These videos are so helpful in helping me with my 90 C4 Corvette. I am the third owner of of my vette , Currently has 72,000 miles and everything appears to be original.

@VetteSource

2 жыл бұрын

Mark, glad I was able help you out. Sounds like a great car you have, I'm sure it's a fun cruiser.

Incredibly helpful, thanks man!

@VetteSource

2 жыл бұрын

No problem, glad to do it👍

Good detail as I'm going to be playing with mine soon, and like you I have an 88 and a 91 set of cars. The 91 car is the one that gets the go ahead because the 88 is an Illinois rot box, but came with a ton of great parts.

@VetteSource

4 жыл бұрын

Thanks for the feedback, 87-92 Formulas are one of my favorite cars outside of Corvettes. The look just screams muscle, and they sound great rolling down the highway blasting some Master of Puppets👍 For those that haven't seen the 88 Yellow Gold here is a playlist with details of the car - kzread.info/head/PLAM-V1w3acphkZJyLroCKcyLO9GzqR6q4

There is actually THREE ports on the plenum with the MAP sensor. With the rear one going to the MAP sensor its self. But just seeing it in the video was enough to figure it out. Thanks

Very god content. Make more on tpi motors. This help me a lot with my 88 Gta. Warm greetings from Poland

@VetteSource

4 жыл бұрын

Thanks, will do. I am starting a TPI tear down/rebuild shortly. Keep an eye out for those videos starting soon. I also have two other TPI videos if you haven't seen those, here are the links - kzread.info/dash/bejne/fICkuMykgpCYZqg.html kzread.info/dash/bejne/hp6fqa6bj6e_gM4.html Thanks for watching👍

Thank you I learned a lot.

@VetteSource

11 ай бұрын

You're welcome. I'm glad to hear it was helpful Clarence👍.

Thanks this is awesome great appreciate it.

@VetteSource

4 жыл бұрын

No problem, glad to do it. Thanks for watching and have a good weekend👍

I was having a problem with the air flow out of the air vents in my 90 corvette. I found a break in the line and spliced it back together and the air is flowing out of all of the vents like new.. My cruse has stopped working so I now know to look for the Problem. Thanks for all of the Help that You have provided

@VetteSource

2 жыл бұрын

No problem👍

Good Video 👍

@VetteSource

3 жыл бұрын

Thanks, appreciate the feedback👍

Nice one Vette source. Love your videos as always and am really enjoying learning. Watching your videos keeps the dream of one day owning a C4 vette alive. Have you ever owned a C4 ZR1? the ones with the crazy lotus engine Also I really appreciate that your videos don't start with "EYYYY WHATS GOING ON GUYS IT'S YOUR BOY VETTE SOURCE..." etc etc. Hate that shit lol. Love that you keep it straight to the point

@VetteSource

4 жыл бұрын

yea, those intros are definitely annoying. Reminds me of the carnival barkers trying to draw you in to their attraction so they can separate you from your $$$. In answer to your question, yes I have been fortunate enough to own a 1990 and a 1991 ZR-1 in the past. They are incredible cars, extremely fun to drive, with one of the coolest looking engines ever built. As a matter of fact, if you watch the end of my Corvette Spring Cleaning video - kzread.info/dash/bejne/i3Wek5qylrvMqbg.html you will catch a glimpse of a ZR-1 LT5 engine I have sitting in the corner of the garage. TTYS

@Jason-fp7vi

4 жыл бұрын

@@VetteSource wow the LT5 looks beautiful, I saw it in your spring cleaning video. Are parts getting hard to find for the LT5?

Excellent explanation. I just replaced the intake manifold on my 91 formula and was wondering about the function of all these lines.

@VetteSource

4 жыл бұрын

No problem, glad to do it. Those lines are easy to miss until they don't want to function correctly. Thanks for watching and have a good weekend👍

@ScottsFormula350TPI

3 жыл бұрын

@@VetteSource After watching I went through mine for shiggles and found 3 open vaccum lines, one to cruise was just sucking wind, one to that t junction for cannister was trash and one to intake itself.. Gracias for your detailed explanations again.

@VetteSource

3 жыл бұрын

No problem, my friend. Glad to do it👍.

Cars with cruise, and or AC got a vacuum tank (ball). It's hidden under the battery tray, typically drivers side. There are two trays.

@VetteSource

Жыл бұрын

Yep, that's a hard one to locate on the f-bodies. It'll drive you crazy looking for it.

Can't thank you enough.

@VetteSource

3 жыл бұрын

No problem. Glad to be of assistance👍

Awsome Video There is 2 hoses in the Throttle body on the passenger side can you confirm where those go

You are the among the very best at explaining every aspect of the project. Your detail is much appreciated. Question for ya, my Formula is identical to yours inside. When I purchased mine there was an original ECM chip for MAF TPI. I am wondering if owner who raced car had switched to MAP system I have been reading about. Pros, cons and how do I tell? Its runs perfectly so I prefer not to mess with anything.

@VetteSource

3 жыл бұрын

S.B., thanks for the feedback, I appreciate it. The MAP system is a little better than the MAF system at regulating engine airflow and spark when you have high performance pieces like cam/headers, heads, or intake installed. You will see these conversions installed when the owner has made performance mods to the engine so they aren't riding around with the Check Engine light blinking at them all the time.

@ScottsFormula350TPI

3 жыл бұрын

@@VetteSource Ty for replying. After staring at it all day it looks to me like it still has maf system,not sure why chip was sitting in car, maybe someone had to replace it. Again your videos are awesome at explaining every detail and the 7.75 rebuild cant come soon enough enough lol.

Excellent video like always love to get my hands on a showroom Formula 350, if that's not asking too much. I'm from Nova Scotia Canada. I reached out to Vandguard Motors several years ago but never heard back.

@VetteSource

4 жыл бұрын

Thanks, appreciate the feedback. Let me check with some of my connections and see if there are any cars floating around out there. Do you have a preference of year or color?

@anthonymacneil2279

4 жыл бұрын

@@VetteSource 87 to 90 if that's not too difficult. Back many years ago I test drove a 87 with 305 TPI yellow like yours, 5 Spd, it was fast, it impressed me back then. There must be someone out there that bought one and sat on it. Much appreciated you doing this. Thank you

Thanks for video now I know were the vacuum line is that controls ac vents inside car, I cant seem to get air vents to operate properly.

@VetteSource

3 жыл бұрын

No problem, glad it was helpful👍

My 90 L98 TA was running fine until it suddenly developed a low idle (300 rpm) problem. Checked and got no codes. Replaced the distributor cap and rotor even though they were almost new (the distributor was rebuilt a couple of thousand miles ago). Checked the coil per factory service manual. Injector resistance is good. Bought a smoke machine but can find no vacuum leaks. The throttle body idle stop screw is plugged at the back which prevents adjustment. As a temporary fix i threaded a nut onto the front of the throttle body idle stop screw which raised idle to 1,000 rpm. Any ideas on what else i should check? Thanks!

@VetteSource

11 ай бұрын

That is a tough one. I would suggest disassembling the throttle body to check for any internal vacuum leaks around the IAC housing. They have been known to develop cracks in the aluminum with age.

I have the '89 Corvette L 98 engine that I just purchased. I have trouble starting it sometimes so I'm figuring the vacuum line to the fuel pressure regulator may not be working properly.

@VetteSource

Жыл бұрын

It's possible, but that particular symptom can be caused by one of many things. I would recommend investing in a factory service manual for your car. It has all the information and diagnostic information you need to keep it running properly.

Very informative. Thanks for sharing. I just picked up an 86 corvette where someone has removed parts of the vacuum system. I’m trill trying to make heads and tails of what’s going on with it. Can you recommend a good resource for mapping out the system? I’ve been looking and haven’t been successful in locating anything. You definitely have the most detailed explanation I’ve come across so far, so thanks for sharing!

@VetteSource

3 жыл бұрын

David, thanks for the feedback, I appreciate it👍. The best resource for detailed information and diagrams for your car is still the 1986 factory service manual. They are a wealth of information, and can be found on ebay and Amazon quite frequently. Let me know if you need anything else.

@Skizzags1974

3 жыл бұрын

@@VetteSource thanks for the quick response! Ok, good to know. I already ordered the 86 factory service manual. I haven’t gone through the entire manual yet, but I did look for something covering the vacuum system and hoping to find mapping or part identification of sorts. Any direction in that very beefy wealth of information?

@VetteSource

3 жыл бұрын

I believe it's in the 8A Emissions and Driveabilty section and should have some diagrams showing component location. Let me know if you don't see and I will check out my manual later.

@skizzags

2 жыл бұрын

@@VetteSource so I’m still working this never-ending project. I currently have the plenum, runners, valve covers and fuel manifold removed. I do have the factory service manuals and there are a lot of individual vacuum sections in 8A, but unless I’m overlooking something, there is nothing that maps out the system. Even what there is really not detailed enough to even show the back of the plenum like you’re detailing in your video. There is a whole lot of deciphering needed with the diagrams. To make it substantially more difficult (not that it wasn’t already difficult), someone has done a number on mine before I got it. The front left wheel well area has been gutted, lines being left open. The air pump is in place but disconnected; the EGR is in place but disconnected:left open. The 2 switch valves near AC compressor have been removed. The heater core switching valve disconnected. I’m trying to make heads or tails of what’s left and what needs to be replaced. I found a website that has colored diagram mapping bro corvette vacuum systems, but they don’t have the C4. This has been an incredibly frustrating process. I’ve been working so many systems and not at a work stoppage. I avoid this vacuum system because of the overwhelming mess but it’s getting to the point where I won’t be able to move forward without figuring it out.

@shawnbryant9955

2 жыл бұрын

I have a 1986 C4 Corvette and I'm hoping everything on mine is still in place. Lol. Let me know if any pictures or video of mine would help you out any? Stock 350 TPI Base model. I haven't changed much on it since I got it.

My egr solenoid (connected next to ignition coil) is connected on one side but looks like it’s broken off in the other. I’m looking all over for a loose vacuum tube but I don’t see anything. Can you show me your egr solenoid? Thanks

@VetteSource

Жыл бұрын

Done👍.

Sweet

@VetteSource

Жыл бұрын

Glad you enjoyed it👍.

Can you do a video on hooking up the computer for the TPI? I have a 305 TPI motor in a 1932 ford coupe but I need some help.

@VetteSource

6 ай бұрын

Sure, which areas do you need me to highlight?

What the T go to on the HVAC line you stated someone replaced. I didn’t hear where the T went or if it supposed to be there

@VetteSource

Жыл бұрын

Hey Dustin, the T junction will feed back directly into the engine harness that runs through the firewall to hook directly into the interior HVAC control that distributes the vacuum to the individual blend doors.

Great video very helpful! Trying to figure out where the vacuum line from the heater control valve runs to on the 350 TPI car with the MAP. Any help would be appreciated!!!!

@VetteSource

Жыл бұрын

Hey Jeff, the vacuum line should have a T junction and then feeds into the main engine harness that goes through the firewall into the passenger compartment.

@jeffs4690

Жыл бұрын

@@VetteSource Much appreciated, had the car stored while I was disabled for some time and the mice seemed to really enjoy the vacuum lines. Thank goodness it was just the vacuum lines. Will try to get out to my shop and see if I can hopefully find some part of a line going into the firewall there. My 1989 GTA is slowly returning to it's former glory days and running again.

@VetteSource

Жыл бұрын

That's the spirit, slow and steady gets you across the finish line every time👍.

If you have a vid to diagnose a no start condition on a 86 t/a MAF TPI, please point me to it. I know the car starts on starting fluid, has a new fuel pump/ external filter too, and 45 psi at the schrader valve,

@VetteSource

2 жыл бұрын

Hey David, I don't have a video made for that particular scenario yet, but with the checks you have already performed and with the car firing up with starting fluid, I would look closer at the fuel injector harness connectors to make sure they are pulsing when cranking. Sometimes the ECM injector driver circuit will fail causing a similar situation to what you are describing. Let me know how it turns out👍.

I am missing the hvac hose and can’t seem to find it anywhere. Where does this hose come out of ?

@VetteSource

3 жыл бұрын

It actually feeds into the main wiring harness that goes through the firewall to the HVAC controls. It's easy to miss when everything is installed still.

I'd like that.

So if then lines are not connected right are leaking would that stop the car from starting my 86 will. Crank with starting fluid just a second then die

@VetteSource

2 жыл бұрын

I've never tried starting the car with them totally disconnected. There would be enough of a vacuum leak at the plenum to probably cause it to run very poor at the least and maybe not start at the worst.

Where does the MAP sensor vac connection get connected to get manifold pressure reading?

@VetteSource

3 жыл бұрын

I don't have my service manual in front of me, but if I am remembering correctly, you should be able to hook it to the rear vacuum port on the center plenum to get a good reading.

Excellent video for my knowledge I have 89 corvette n all thise hose are brittle how can I replace them ? If anyone knows thank you

@VetteSource

2 жыл бұрын

Hey Oswald, thanks for the feedback. Glad it was helpful. Dorman makes a GM/Ford vacuum line repair kit with fittings. I believe it should still be available at your local parts store. Let me know if you have trouble locating it and I can point you in the right direction👍.

Need to know more about that damn air flow meter I seem to have to change one every three years

@VetteSource

Жыл бұрын

That is interesting, maybe a case of excessive vibration?

Can you give a link as to where you can purchase the vacuum line connections and/or repair kit?

@VetteSource

Жыл бұрын

Dorman makes a repair kit for these vacuum lines. They are available at most auto parts stocked under hard vacuum line repair kit.

Ok on my 1985 corvette the Vacuum line that goes to the FPR goes under the plenum i guess to that front one, not like this one have you ever seen one like that?

@VetteSource

3 жыл бұрын

yep, the Corvettes are just a little bit different due to the location of the evap canister and cruise control vacuum module. Instead of having a direct connection at the front under the throttle body it is a T junction that runs off the driver side and feeds into the front wiring harness.

Hey I have oil coming out of the dip stick of a 91 with 118,000 on the engine what am I to do

@VetteSource

Жыл бұрын

Off the top of my head, it seems like your crankcase is pressurized for some reason. Do you have the PCV system disconnected, or have you checked the condition of the individual components?

Thank you for this presentation. The f body vacuum ballshape canister is inside driver side fender in front.can be seen from bottom.for cruise control of course.

@VetteSource

4 жыл бұрын

That's it. I knew there had to be one in there, just couldn't remember where. On the Corvettes it's in the driverside inner fenderwell in plain view. Thanks for watching👍

What I'm looking for is some sort of diagram or at least explanation on the flow of coolant thru the heater core control valve and the oil cooler. There's a nipple on the radiator that looks like it runs to the oil cooler. Is that going to or from the cooler? It makes sense that it would be going to the cooler, since its coming straight from cooler water. But then again if its coming from the cooler, its going into the whole heater core system, and it looks like fluid passes thru the core, regardless if a vacuum is applied to the heater core valve.

@VetteSource

3 жыл бұрын

I may be remembering the f-body routing incorrectly, but I think there is a T-junction under the water pump like the Corvette with one side going to the heater core, andd the other to the oil cooler. I would have to look at the diagram again to refamiliairize myself. I would suggest looking for the correct year model GM service manual. I know for sure the diagrams are in there.

Which of those three vacuum lines goes into the MAP sensor?

@VetteSource

Жыл бұрын

The vacuum circuit for the MAP sensor connects directly to the rear most vacuum port on the side of the intake plenum, directly in front of where the distributor cover attaches.

hello , i have a 1991 pontiac trans am gta 5.0 305 engine tuned port injection , i sent my car to a mechanic a couple of years ago he lost my ignition coil bracket and screws , he left the ignition coil loose on top of some wires i didn't notice it right away , can you show me step by step where it goes and the ignition coil bracket shape so i can look for it , thank you very much i really like your channel !!

@VetteSource

4 жыл бұрын

Thanks for the feedback. The bracket you are looking for is installed underneath the back two intake bolts on the passenger side. I point it out in this video here - kzread.info/dash/bejne/qI53yap6eLe1krw.html Let me know if you need any further information

@falleneagle1969

4 жыл бұрын

@@VetteSource thank you that was very helpful , regarding ignition coil bracket !

I’m having a hard time to keep mine running. It only stays at about 500 rpm and then jumps up to 1000 and repeats the cycle. Then I will hear pops inside the engine. Any ideas?

@VetteSource

2 ай бұрын

Have you checked to see if any trouble codes are popping up in the system? An erratic idle can be symptomatic of several different problems, so a trouble code would help to start narrowing it down.

Hi! If i disconnect the vacuum line of the EGR valve. Is the valve will be closed?

@VetteSource

5 ай бұрын

Yep, that should be tye default position with no vacuum circuit hooked up to it.

@zoltanbalinttoth5013

5 ай бұрын

@@VetteSource Thank you!

So I only need the fuel pressure regulator if I plug the other two off

@VetteSource

2 жыл бұрын

Yep, that is correct. You will lose the accessories and HVAC system which all require vacuum input.

I know this is an old post but hopefully you can help me out. Installed a 357hp crate engine in a 1990 and MAP is giving me a rich condition and poor idle? Any Help>

@VetteSource

2 жыл бұрын

Hey Ron, lots of possibilites once a crate engine is installed, but first thing I would do is hook it up to a professional scan tool and see what the ECM is doing in real time. That will give you some insight and clues as to what to look for. Off the top of my head I'm wondering if you have a software problem between the fuel injectors on the crate engine and the factory ECM settings. Let me know how the troubleshooting goes👍.

@72rdallen

2 жыл бұрын

@@VetteSource done that! My issue is not enough vacuum at idle

@VetteSource

2 жыл бұрын

Ok, sounds like you could have an EGR circuit problem. How much vacuum are you pulling at idle? Does it have a pretty big cam?

I had work done on my 85 corvette and in putting those hoses back i noticed that the hose going from my fuel regulator wasnt there. The little circular vacuum hose and there were hoses placed there from the front of the engine. And my question is does that circular hose go to the plinum only or are there any other hoses that go to those ports on the plinum ?

@VetteSource

2 жыл бұрын

It should be directly connected to the plenum, and doesn't share the vacuum circuit with any other accessories. I don't have my diagram in front of me, but IIRC the rear most vacuum port on the plenum is used for the HVAC/cruise control/vacuum tank.

@ericperry8309

2 жыл бұрын

@@VetteSource thank you for the reply. Thats what i thought but in putting that circular hose there i'm still trying to figure out where these other 2 vacuum lines go. Thats the confusing part. I replaced my fuel regulator because i was noticng raw fuel coming out of my tailpipes and after i replaced the regulator it still spits out that carbon soot out of the pipes. So ure saying i should place that circular line on that port ?

@VetteSource

2 жыл бұрын

Try that first, but with raw fuel exiting the exhaust pipe you may have a torn diaphragm within the fuel pressure regulator itself. Something is allowing too much fuel to enter the combustion chambers. Let me know how it goes.

@ericperry8309

2 жыл бұрын

@@VetteSource ok i was thinking it might have been one of the fuel injectors placed in the head wrong because the guy had to remove them to replace the manifold and i don't think they were lubed up before being placed back in the manifold and they look like the factory injectors so i ordered new ones to replace those just in case while i was down in there anyway. But while i'm replacing them i will check the fuel regulator for tears.

@VetteSource

2 жыл бұрын

Good idea. Let me know if you need anything else.

Where does the vacuum line for the map sensor go to?

@VetteSource

3 жыл бұрын

Brian, that hooks into the underside of the throttle body, at least on.the corvette. I believe it's the same on the f bodies.

EGR is an exhaust gas recirculation to cool the combustion chamber stops the pinging

Binge watching your videos, very informative, need a camera stand however, getting a bit dizzy.

@VetteSource

2 жыл бұрын

👍

Great info...USE A CAMERA STAND AND A LIGHT.....TAKE THE VIDEO OF EACH PLACE AND EDIT THEM TOGETHER YOUR VIDEO WILL BE AWESOME INSTEAD OF DIFFICULT TO WATCH

@VetteSource

3 жыл бұрын

Paul, thanks for the feedback👍. Currently working on methods to make the videos more stable while maintaining the POV look and feel.

@dukeman7595

2 жыл бұрын

@@VetteSource Have to agree with Paul, love your videos, found you tonight, however, the sudden movements are very difficult to watch, one becomes dizzy from motion sickness.

@VetteSource

2 жыл бұрын

Yep, that's has been a struggle for me. Trying to figure out how to do the walk-arounds and keep some stability has been a challenge.

Dang you know you stuff.. I have an 88 35th Anniversary that has an intermittent erratic idle issue that one can find.. can you do some consulting for a fee? Thanks

@VetteSource

4 жыл бұрын

Sure, glad to help. You can reach me by phone @832-654-7367 or email vettesource@hotmail.com

@HustleDiffrnt

3 жыл бұрын

I have a 91 with that problem also

@VetteSource

3 жыл бұрын

Yea, common problem that can be frustrating to run down sometimes. I would suggest starting with hooking a scanner to the car while it's running to check senor outputs to see if they are out of whack. Most common issues with the erratic idle are the MAF, IAC, TPS, or a combination of the three.

@keithavery5639

3 жыл бұрын

It ended up being the computer

@VetteSource

3 жыл бұрын

Ah, yes. The other problem area I forgot to mention. 😁

What is the vac. Ball up front fender and lft headlight area for?

@VetteSource

3 жыл бұрын

That's the vacuum reservoir and it acts as a vacuum storage device while the engine is in operation. They have been using them since the 60's, and have slowly figured out how to make them smaller as the years have progressed.

@rcmoot

3 жыл бұрын

What feeds off of it?

@VetteSource

3 жыл бұрын

The EGR valve and solenoid, HVAC, and cruise control.

@rcmoot

3 жыл бұрын

I still have to reinstall mine , just for hvac only . Carbed

@VetteSource

3 жыл бұрын

Ok, gotcha. Yep you will need it to activate the blend doors so the A/C and heat will blow from the desired vents.

What's the fuel filter called under the tune Port.

@VetteSource

11 ай бұрын

You mean under the intake manifold plenum?

@rhandro

11 ай бұрын

@@VetteSource yeah.

@VetteSource

10 ай бұрын

Oh, the one at the rear of the plenum in front of the distributor. That's the fuel pressure regulator.

I have a question for you not related to this subject but because our cars are literally equipped clones. I know nothing about gm transmissions and my rpo code has 2 numbers for 4 speed automatic, one is standard number i believe rpo code MD8 and then next code is for 4 spd auto MXQ im assuming heavy duty transmission? please forgive my ignorance but up until this purchase the only thing I knew about Firebirds was that birds fly... Thanks again

@VetteSource

3 жыл бұрын

No problem, the MXO simply spells out your car came equipped with an automatic overdrive transmission, and the MD8 identifies it as a TH700R4 transmission

@ScottsFormula350TPI

3 жыл бұрын

@@VetteSource Thats just your average gm 4 speed automatic? The one thing ive noticed is people dont talk very highly about the 700R4's. Mine shifts like a dream, there is absolutely no play between gears. And of course I wouldnt know if a shift kit was installed but it gets a mean second

@VetteSource

3 жыл бұрын

Yep, that's the corporate GM unit. I'm not sure why people talk it down. Its basically just a meat and potatoes automatic overdrive unit. They put them in about a billion GM cars, and they are extremely durable.

@ScottsFormula350TPI

3 жыл бұрын

@@VetteSource Can you point me to a place to get parts for the Borg Warner rear end for this car. Can you get originals or just reproduction parts? I know having the 3.27 does not help my cause as I have heard its about the rarest of the bunch that were available...Of course .. I want to keep it original with aluminum calipers and wut not

@VetteSource

3 жыл бұрын

You know, quite a few of these items are still available from places like Rock Auto and other similar online vendors. I think another manufacturer took over the Borg Warner tooling for the gearsets and rebuild kits, but I can't remember the name off the top of my head.

I have an 1985 vett it runs like crap until wormed up check engine light is on and im ready to ditch this set up and new intake and carb

@VetteSource

7 ай бұрын

Hey Heath, have you pulled the codes from the ECM and checked the basic components yet?

The MXQ cost a guy almost $600.00 extra bucks so I hope it was something special lol..

That looked like a MAP sensor that was used on TBI

@VetteSource

3 жыл бұрын

Yep, the same MAP sensor was used on many of the 80's-90's GM vehicles.

The vacuum canister is inside the front bumper

@VetteSource

4 жыл бұрын

Hey Noah, thanks for the comment and heads up. Funny how certain items will be in different places than you expect them to be even by the same manufacturer

@maclogan6872

3 жыл бұрын

It’s below the battery tray area on the driver side, globe type canister

@VetteSource

3 жыл бұрын

Mac, thanks for sharing the info👍. On the Corvettes it's easily viewable from inside the engine compartment, so it's interesting that this one is somewhat hidden between the inner fender and front bumper.

Most people just buy rubber hose for those vac lines

@VetteSource

3 жыл бұрын

Those will work for sure. The reason they used the hard plastic originally was to protect from the underhood heat. Of course the hard plastic lines also eventually fail. Dorman makes replacements that you can find in the HELP section of the local auto parts store.

Wrong one thoe nice

@VetteSource

2 жыл бұрын

Cool, which one?

I have this engine in a 1994 truck lol but its far from stock

@VetteSource

3 жыл бұрын

I'm sure that's a shocker when you pop the hood👍.

and you mentioned none of the lines coming off of the throttle body.. bummer

@VetteSource

4 жыл бұрын

Yep, realized that after I made the video. Funny thing is that the routing of that line is different between Corvettes and F Bodies. On the Corvette the line runs out the driverside to the vacuum canister mounted in the inner fenderwell. On the F body it runs straight back to the EGR switch if I am remembering correctly and then tees off to the vacuum canister. Thanks for watching👍

No one ever identifies the hoses at the front of the throttle body

@VetteSource

3 жыл бұрын

I hear ya. The hoses actually serve different purposes between the Corvettes and F Bodies. On the Corvette there is a T junction that runs to the vacuum reservoir, and on the F bodies that port services the EGR switch? if IIRC. I haven't looked at it in a few months and I'm forgetting off the top of my head.

NO ONE SHOWS ANYTHING ABOUT THE 1990 CORVETTE! that car is such a mystery! where does the hose to the HVAC connect to going from the check valve!?! big mystery woo woo show it please!

@VetteSource

2 жыл бұрын

Are you talking about where it feeds back into the wiring harness going into the firewall?

@angbar9075

2 жыл бұрын

Both

@VetteSource

2 жыл бұрын

After routing through the check valve it feeds back up towards the driverside front of the car and terminates at the vacuum reservoir.

@angbar9075

2 жыл бұрын

@@VetteSource thank you very much

@VetteSource

2 жыл бұрын

NP, glad to help👍