I like how you overkill your diagnostics for the sake of education, you leave no stones unturned ...Thanks Ivan 🤝

Love the way you "think" things through, before swapping parts.

Ivan, Eric-o, Paul Danner, you have taught me so much...Love you all.

Excellent diagnosis technique Ivan. Keep up good works and thank you for sharing.

you're a genius. I love your style. Always thorough. Even when you've found the problem you continue your diagnosis to make certain there are no other problems.

Very impressive Ivan, way to think outside the box. I met you at last year's ETCG's meet and greet. Absolutely love these videos and will say one of my favorites was with SMA "Twisted Cam"! Spent 25 years in the field with 20 off bc of cancer but recently making a comeback. I volunteer at my church...we have a shop with 5 lifts. it's pretty amazing, we gave away 25 cars last year and fixed hundreds for ppl with no money. Look forward to more vids. Thank you

@PineHollowAutoDiagnostics

7 жыл бұрын

Wow Joe, thanks for the comment! People like you are a true inspiration!!

@georgepickett6853

5 жыл бұрын

Joe Mikos you are a very good person. Wishing you a long and blessed life in the service of the Lord

@pedrorojascervantes3928

3 жыл бұрын

Car repair costs can be huge & it's heartwarming to hear such a real help being generously given to the brethren & anyone else who's fallen on hard times ! May you be blessed richly as you continue to bless others! Cheers from Ontario Can.

Certainly what every technician should do! Great job, very informative and good amount of detail.

Good job bro, love the detail given to pursue issue. Most people have no idea how much time and expertise is involved in diagnostics. After you spend all that time they look at you and say, "I'll fix it myself or take it down the street to El Chapos". When you hand them the diagnostic bill they say, " You didn't fix anything!"

Very nice video Ivan as always and some really good comments and tips below. I really enjoyed this Ivan thanks for sharing.

Best video and description i have viewed to date on any automotive repair on You tube. Comparing it to hundreds at least. Than you

Clever work around to dealer special tool that is a shut-off valve installed in-line at filter, IIRC. Thanks for a good video!

Nice, very nice diagnostic way! You do not leave any stone unturned! Thank you!

Ivan, thanks for the video, you may have saved me a bunch of time. Great job on the alternative methods of blocking that return line too.

great video Ivan! One thing to be considered is when testing a liquid system with air is you may find pressure leakdown a lot slower with air as it expands versus testing with a liquid.

Thanks! Timing is perfect as I am diagnosing 3 of 4 Astro vans with similar starting issues. Was cap and rotor on one van, I can hear the spark jumping outside the plug boot on another, and I'm chasing crank sensor wiring chafing on the third. Thanks for another avenue for testing.

@PineHollowAutoDiagnostics

7 жыл бұрын

Astro vans are cool!

Handy tip with the air to check non return valve---using the old noggin again, Ivan !

OHHH More S10 vids. Best truck ever LOL. I guessed this one right away since it happened to me and it was the check valve. (2.2L doesn't have the spider system though) I never thought I'd be giving you a piece of advise,,, but, If the pump is good, they sell an external check valve that can be installed in the return line without the need to do a major job. I learned that the hard way. Also, if the customer decides on a new pump, go dealer. I put one of those $50 Ebay pumps and it lasted 2 months and had to pay for the full job again.

Very creative diagnoses Ivan. Thanks for sharing. Cheers my friend.

Whenever you have bleed off on these vehicles, you connect into the fuel filter outlet to check if its the FPR or the pump check valve. GM Specs are pressure must be 73 psi to 108 psi at the pump. Deactivate the fuel pump. Pressure must remain above 55psi for at least 10 minutes. If this leak down test fails, there is a leak inside the fuel tank. If leak down is within specs on this test, and leak down at the service port is excessive, there is a leak in the plenum. Sorry if it was mentioned in the video. I didn't watch it all. I owned one of these vehicles for over 10 years and got to learn all its quirks.

@unclechaz8426

7 жыл бұрын

Exactly. Much easier to do different test procedures at the filter lines.

@PineHollowAutoDiagnostics

7 жыл бұрын

That's a good way to do it too. I just didn't feel like crawling under the vehicle, disconnecting the fuel lines, getting special adapters, or getting showered in gasoline lol

@kylelove927

5 жыл бұрын

Great to know!

I had a 1995 GMC Jimmy and the fuel pressure regulator went bad. It was not sequencial FI it just had what looked like a TBI with the spider attached to the nozzle. Mine was the aluminum clam shell intake. Like you said back then the dealers wanted a grand in labor and wanted to replace injector. I found a regulator kit and just replaced regulator for about 100. Leakig fuel had washed the one side of the intake clean. Great job finding the fuel pump leak.

Excellent test and find Ivan.

Thank you Ivan. Happy 4th to you and the family.

Thank you for actually getting into the science instead of just saying what to look for.

Thanks again Ivan. If you get the job, how about a teardown of the pump? Eric O and you are fantastic! boat load of knowledge and tips.

Nice diagnosis Ivan. Plastic fuel lines, ugh. There are some great comments here on the system as well. Thanks!

@kevin9c1

6 жыл бұрын

Plastic technically lasts longer than rubber OR metal.

@sockpuppets7256

6 жыл бұрын

theres a vid on youtube of an m5 catching fire cause of melted plastic fuel lines, crazy.

Nice one Ivan. Very inventive test. Awesome as usual.

@robertweir9034

7 жыл бұрын

I agree. Ivan always fines a way!

Great work Ivan! Have a great weekend.

I've seen that before. It ended up being a faulty check valve in the fuel pump. (98' 5.7 Chevy).Oh...well there you go, you found the same issue. Cool. Nice additional test.

I've got the same exact problem with my '03 5.3L. I've now got something to take to my really good 'backyard mechanic'. Thanks.

Thanks that was interesting. Was impressed with that 110 welder! I have two of them. one is a ding don't and without a doubt useless. the other is a snap on and works well on sheet metal but dought it would weld that well on a rim. well done.

For future reference, because there are zillions of these 4.3L engines: If you're going to replace the fuel pressure regulator on one of these intakes with the poppet spider (which you didn't this time), you can replace the poppet spider with a more reliable injector spider from the later models. This is usually a good idea because the effort to get into the upper intake plenum is significant and the spiders are known problem areas.

Awesome proof of concept diagnosis, on both systems.

Excellent video as always, I like that pressure bleed test

Best on cars 👍great ideas. My blazer's been sitting for 6 years, finally getting a distributor ( mysterious misfires) Now i'm thinking fuel pump and spider too.. never ends.

@ninjagodzilla6402

5 жыл бұрын

6 years & just now getting parts!!!!! Lol.u may have more problems by now!

Thank you! Very helpful video , I'm going to give it a try . I've been driving my truck this way for the past 12 years. I always ask myself why it starts this way @ a second crank try. :-)

Removed my pump and wouldn't you know the damn check valve fell off the pump assembly inside the tank. This video helped me determine that the misfire code was a fuel pressure issue just from the description of the same issues at the beginning of the video is what I was experiencing with my 99 4.3l Silverado

Awesome video I like your no B/S approach peace and much respect to you Jason. well used gmc sierra 1500 4.3 V6 vortec W with 405 thousands miles

Another great vid, Ivan. Very informative.

Nicely done Ivan!

Looks like I need to replace my fuel regulator but it needs a diagnosis thanks for the tips luckly I have all the tools you listed

call mme a packrat but here's a tip---- when you change fuel filters take 2 minites with a hack saw or cutoff tool to take the nipples off the ends. need a plug just squish the end in a vice and a drop of braze and wallah !!! need an adapter? most brass compression fittings tighten right on them. you can tee 90 or 45 ells etc. sometimes the most usefull tools are ones you make yourself. oh and btw it just figures you'd have a bicycle pump laying around lol

@PineHollowAutoDiagnostics

7 жыл бұрын

Great tips!

@pedrorojascervantes3928

3 жыл бұрын

Nice ! Someone is thinking! Thank you.

Blazer ... ugh! I don't miss mine (was actually a Jimmy, but same thing basically). It's out back on the hill cut into a million pieces, lol. Rest of it's parts are all over the world now. That was my crash course into OBD-II about 7 years back - I got so frustrated I parted it out! LOL! DEFEATED! I had a similar yet opposite fuel pressure problem in a '92 Volvo 940 wagon, which was very strange. The check valve would intermittently block output of the pump! Car would start and run like a champ in the morning, but drive a mile down the road, it would croak and need a tow back. Wait a half hour to an hour, and it would fire back up again. Eventually it got to a point where it would have to sit all day long before it would restart. Acted just like a failing ignition coil, so that's where I started. I watched my timing light blink all the way through the stall. Could hear the fuel pump running with every key cycle! Fuel pressure gauge told the tale. 0 psi when it was a no-start. I was avoiding the pump at first, because the owner had just replaced it less than 6 months prior. Goes to show, "new" or "recent" doesn't mean GOOD! I yanked the pump to see what was going on. Put it in a container full of acetone, and powered it up on a battery. Pump was wizzing away, with not a drop of fuel coming out. I started tapping the ground wire for a rapid on-off cycle of the pump, when I heard a POP - had a 6' geyser of acetone, lol. Pump was good, check valve bad - since it's part of the pump, gotta throw a new pump in there. Was a Walbro pump too - they're normally pretty good units in my experience. That was an interesting one for me! Wish I had a decent camera to shoot that one. Think it would've made for a great video.

@PineHollowAutoDiagnostics

7 жыл бұрын

Great story! Thanks for sharing :)

My $0,02. Leaking regulator to return line = fuel pressure lower than spec (pressure loss so quick that leak must be big). Leaking check valve in the fuel pump = full pressure but after pump switched off, quick loss of pressure. Ruptured diaphragm in the pressure regulator = severe flooding with that rate of pressure loss. Cheaper fix than new pump = add check valve to fuel pressure line, use the existing connectors and in line check valve -> no need to replace expensive fuel pump to fix the check valve.

@PineHollowAutoDiagnostics

7 жыл бұрын

Excellent ideas! I wonder if they sell an in-line check valve with quick connect fittings separately? That would be the ultimate 5-minute fix ;)

I like your lateral thinking Ivan with problem solving! Have a great independence day holiday over there.Are you back cooking for yourself yet ha ha.

Nice trick with the air pressure test. Have a happy 4th of July

Dude, gotta love your homemade diagnostics tools! Might even get a foot pump now! Excellent technique and approach to diagnostics Ivan, you really are something.

@movingupautodiagnostics8645

7 жыл бұрын

Btw, truck's running a little rich, that might be a good video too 👍🏻😉

Brilliant Ivan! Very useful test!

Love the ideas you think up. Totally ingenious. JD

@robertweir9034

7 жыл бұрын

He is that!

I went through a fuel issue with my 99 Tahoe(same fuel system), occasional long crank, run rough, no codes. A friend clued me in to the fuel system issues, after a long cold start crank I pulled the two center passenger side spark plugs and sure enough soaking wet with raw fuel, fuel was running out of the regulator right down the two intake ports. I wound up replacing the entire spider unit with an upgraded AC Delco kit, runs much better and 100k later I'm still happy with it.

@PineHollowAutoDiagnostics

7 жыл бұрын

Upgraded spider is the best long-term solution for sure.

Молодец Иван! Русская смекалка даёт своё! Когда попадаются старые машины, начинаю с ревизии массы на PCM, чтобы исключит лишние телодвижения.

Great logic and approach to diagnosis. Thanks,

I like that pressure testing setup

My 03 Town and Country did not have a schrader valve at the rail. I used a 1/4 hose and clamp to attach directly to the hose from the tank.

Friday Friday weekend is here have a great one ! Keith

this was such a good video. changing the game with these new tests. impressive

Great vid! Love the simple troubleshooting techniques 😊. I bought a 96 s10 w/4.3L vortec. Think there's gas getting into the oil (smells gassy). Not sure if it's possible but I'm thinking it's a spider/regulator issue. Thanks for the tips!

Once again awesome video! One of these days im going to have to ride the motorcycle up to meet you in person and buy a shirt off you and maybe learn a thing or two. Im always out riding on Rt 45! Love the road and riding pine grove mountain!

@PineHollowAutoDiagnostics

7 жыл бұрын

Definitely! I'll gladly join you on a motorcycle ride too!

@BoostedMoose517

7 жыл бұрын

Sounds like a plan to me! Just let me know when and where and I will be there. Just did the steering stem bearings on my bike so I do need to get her out and get some miles done!

Man this is a great video I'm going to do this to mine. Mine just dosnt start right up when it sits overnight and the initial crank it runs rough for a sec like it not getting enough fuel then it smooths out.

love learning ways to test my diagnostic hunches. love it even more when my first guess is the correct answer, but a guess is not a diagnosis... rather it is a place to begin verification tests. I'm learning a lot about easily doing verifications from you and SMA

thers a 13mm bolt for a bracket if u follow the fuel lines back towards the fire wall makes those lines easyer to get out...i bet the regulator is leaking too common on those 4.3s good vids man!!!

Very nice diagnostics!

great job mate some nice testing there

very detailed/informative video, just wondering if someone were doing this test at home, can they cycle they key a few times and have a listen to the fuel cap area to see if they hear what you heard?

Good job Ivan, sam

Nice job Ivan.

Twist off the vacuum port for the brake booster check to see if you see raw fuel stains inside the intake manifold runners . Also check your ecm data for rich exhaust. . Check freeze frame and see if it happens when the engine is cold ..

Great work Ivan

Nice job Ivan!!!

DUDE.... that hand pump is a darn good idea... I suppose that if a guy were to look around hard enough he might even be able to find something to make a variety of different adapters to pressure test just about anything ... like say coolant systems.... could even go around junk yard hunting b for different pressure caps to drill out and retro fit for testing... you would have the absolute right cap for every system for WAAAAYYY cheaper than snap ons master kit

very interesting, nice testing method. thx for sharing.

thanks, you helped me with my diagnostics... 😊👍

that spider injection system strikes again....i have a 92 astro 4.3 with the old TBI system. ..to bad they did not upgrade that system and keep it instead of spider nonsense...good diagnosis ivan.

@workingshlub8861

7 жыл бұрын

i stand corrected...thought for sure spider was leaking. if that has not been replaced yet he should consider changing anyway if he wants to keep the the truck....gonna get him sooner or later.

Use a Delphi pump Ivan, or go dealer. Ive done a TON of GM pumps. Just did a 2000 S10 the other day. Remove the drive shaft to give you more room. The front of tank is held on by a bracket that mimics a shelf for the tank to rest on. Your best bet is to remove the bracket from the frame and keep it attached to the tank. Dont mess with the front strap. Youll have to undo the parking brake equalizer so you can get one of the bolts out for the bracket. Pump module has one large snap ring for removal. Youll have to update the pump connector harness from the kit. Other than that, its easy peasy. You owe me 99 cents brotha!

@PineHollowAutoDiagnostics

7 жыл бұрын

I did give the fuel tank a look-over, and the retainer ring looked like a regular twist-off type that rusts to hell...and yes I always use OEM electrical parts :)

@2aminitials

7 жыл бұрын

No removing the bed to get to the pump on those S-10s?

@woppini

7 жыл бұрын

us mobile guys dont have a hoist to safely lift them

@dillonkoch72

6 жыл бұрын

I just removed the bed to put my fuel pump in Delphi is the one i chose

@erichagler7842

6 жыл бұрын

i know this is a yearr old , but the removal of the bed of the truck is the way to go on this one and you can test it on truck to comfirm the fix when you are done ...

I got 2002 s10 ext cab 4.3 i bought new and few times low idle and stall and the problem was sidepost cable every time. Still runs great.

You can take a small mirror and a flashlight and look down through the throttle body at the fuel pressure regulator. If its leaking you will see it drip or there will be a clean spot inside the intake.

awesome videos man very well explained helped a lot

You can get a repair check valve that gets installed in the line for this type problem. I've installed a few of them when I had a known good pump. They are a LOT easier than dropping the pump and can be left in if you decide to change the pump at a later date. They run about 40 bucks and install REAL quick. Googly fuel line check valve and you should see them pop up. Dorman even sells one.......

@PineHollowAutoDiagnostics

7 жыл бұрын

I'll search for one right now. Does it just clip on to the fuel filter on the downstream side? That would be a sweet fix!

@Blazer02LS

7 жыл бұрын

The one I use most of the time has a few options for attachment. I usually just cut the steel line, and install it like a compression fitting. It also comes with hose fittings that can be installed in the plastic line but that is a pain normally. There is one that is GM specific with the proper push connect fittings but it's almost as much as the wholesale price of a pump.

@JOHNPHUFNAGEL

7 жыл бұрын

it is made by sur&r about $40-50 depending on what size line. Advance auto sells them

I wanna see you do some diagnostics with out your fancy diagnostic tools. Maybe just a basic hand held code reader and test light.

Good video. Verifying that the regulator isn't leaking is like putting a cherry on top of sundae.

fuel filter and fuel pressure regulator can cause this too,if the pump was bad it would barely run if the engine had a load on it. Remember you need spark,fuel pressure,air flow, and cylinder compression to start a motor.

I remember so many of these CFIs with regulators that failed that would actually hydrolock the engine...

what autoscanner Plus do you use and what scanner do you sudgesting to buy? I see colors-is it ABS airbag scan for $ 150 on ebay?

Bad check valve or hole in hose between fuel pump and top of fuel pump assembly? Had a '99 somoma with this issue, turned out it had a hole in the thin plastic hose.

Good video. Do you know what caused the negative fuel triims?

I guessed incorrectly. Was certain it was a bad fuel regulator under the upper intake plenum. A bad regulator tends to leak internally toward the passenger side of the intake, making bank 2 rich. The 4.3 liters are known for this problem.

@Hernandez530

7 жыл бұрын

Stanley Waggoner i thought the exact same thing..

@throttlebottle5906

7 жыл бұрын

as fast as pressure was dropping, it would have drowned itself and been blowing clouds of raw gas

@snw56

7 жыл бұрын

Good point!

I have the same engine in my little truck. Easy to work on and no major problems. Just like my Olds. :-)

@PineHollowAutoDiagnostics

7 жыл бұрын

They don't make em like they used to...

@CountryBoy4ever

7 жыл бұрын

No kidding. I got out of the auto industry a few years back. I'm glad I did but I still enjoy tinkering with my own cars. Just did a set of injectors on my 30 year old Olds a couple weeks ago.

I had to add a small rubber piece of line on the return line due to a broken lock that attaches to fuel pump could that be cause aswell

Seems like you went to a lot of work diagnosing this. I just pulled the return line out of the plenum, turned the key on an saw right away that the regulator was wide open and held no pressure. Replaced the pressure reg and all is good.

I was hoping you would test the injector end as well.. Always wise to check other possibilities. Did you by chance look into or figure out the rich fuel trims.? Seeing total trim of -13 to -17 at some points.. Hmm? Great vid as always Ivan. Cheers

@PineHollowAutoDiagnostics

7 жыл бұрын

Wasn't really worried about those trims...it's most likely the MAF getting dirty and overreporting airflow at idle, underreporting under load :)

what fuel pressure bleed off click the key on and off 3x starts right up?

Correct me if I'm wrong but by blowing air in through the pressure line did you not just blow any trash that was in the fuel filter into the tank?

Damn that was a cool test Thanks

great information thanks friend

I have a 2003 s-10 (4.3L) That only goes into closed loop after engine temp passes 130 degrees. Normal for the 4.3's?

the design for the spider injection system came from the movie " the monster that ate Cleveland " the things they can do with Plastic!

Ok,my Mechanic put 3 AC Delco fuel pumps in my 2000 S10.Still not holding pressure.Leaking but in the tank.Work good for about 4 or 5 cranks.Then long cranks.Sometimes it cranks the first turn.What can be causing it to lose pressure.

did this fix the hard start issue ?? , I've got one doing someything similar, cranks each and every time once it has run for a couple of min, but has to be initially started with starting fluid.. time to start testing stuff .. but confirmation would be nice if you did do the job.. thanks

Had the same problem on my 98 blazer,every morning no problem.after a brief or long use turn it off for five or more minutes,wont turn on after a few long cranks then it would work.after I bought a new fuel pump,I won't say we're I got, put let say i didn't get it at my local auto parts.its was pump check valve.

Could you help a brother out? My BMW M5 2006 V10 drains the battery only in the cold but need to see the electric diagram to see what is involved with start sequence.

Additional possibility @ 8:00 - rusted out fuel line is letting the pressure out.