Well done. Thank you for the information. Your a good man for sharing information like this to people who cannot afford to get their vehicles done in a shop. I know that sometimes, troubleshooting gets a bit expensive when you don't really understand the component and its function and relation to other components. The understanding or knowledge is the reason why mechanics gets the same bad rep as car salesman. Mechanic's lack the knowledge (or does not want to update their skills) and their trial and error style of troubleshooting results in the expense getting out of control which makes the costumer unhappy and doubtful. Well to make this short, there are 3 kinds of mechanics out there: 1 - the trial and error kind; 2 - the know what the problem but makes it look really bad to get more money; and 3 - your kind of a mechanic, the kind that has good principles (willing to share knowledge and for sure fair enough to customers). Your a good man. thanks again

Your channel might not be the most popular in the Automotive category, but you are actually the best and most enjoyable without a doubt! Thanks for all the awesome videos, I appreciate the hell out of your narrations.

Thanks in large part to your great videos, Brian, my '95 Honda Accord EX with nearly 300k miles is running tip top. Thanks especially for your Accord VTEC water pump replacement video. I jumped in way over my head with that one and your video helped me through it and saved my car. Now with nothing to fix at the moment, I still watch your videos (like this one) to: 1) become more knowledgeable in general when it comes to cars and 2) for pure entertainment value! You should be on prime time television my friend. Thanks so much for doing these videos... I know a lot of hard work goes into filming and editing each one. It is greatly appreciated. Peace!

You are a very talented teacher. Lot of very smart guys making videos but don't have a natural ability to teach. I rate you up there with ETCG, SCANNER DANNER, REALFIXES REALFAST, SMA, Mandy ETC. I'm grateful Brian, thank you.

Hey Brian, great work!!! i think knock started appearing mainly due to the low octane fuels as lead was banned (being toxic and damaging the catalytic converters). Cheers!

WOW, the actual internal of the sensor is soooo crazy. Sorta of xtal microphone ... Thanks, really the best vid on knock I ve ever seen. You never dissapoint !!!!

Great explanation video, Brian! I like the knock sensor bench test with the vice. The only thing you really need to confirm proper knock sensor operation is an OSCILLOSCOPE! The voltmeter on the AC scale only gives you a general amplitude of the signal. A faulty knock sensor may still produce the right amplitude, but the signal will be very erratic and choppy instead of a smooth sine wave. Recently had an '01 Lexus RX300 in the shop with an intermittent P0330-Knock Sensor Bank 2 code. On the bench, both B1 and B2 sensors showed a similar signal. However, zooming in on the waveforms, B2 looked more like a ragged square wave compared to B1 which was a smooth sine wave...pretty awesome. No other way to confirm the fault. Knowledge is power!

@joeshearer1247

8 жыл бұрын

Hey Ivan do the new style knock sensors on Chevy ls3 ever fail to sense detonation and end up causing the timing to advance too much or do I have another problem if I have detonation

@gijsiescudda

7 жыл бұрын

motoYam82

@greygoosemafia

6 жыл бұрын

Does an 03 durango 4.7 have a knock sensor?

thank you so much for your videos. I went to change my wife's breaks and was immediately presented with your dodge journey brake video I looked up knock sensor and here you are again. Please keep them coming Brian, I know jack crap and appreciate all your help.

Very cool when guys like you are willing to spend your time helping others. Cheers

Brian I have had good luck with Standard/Bluestreak knock sensors for LS engines. Last one I did was my own 2500hd. I have yet been able to remove the harness connector without it shattering so I always order a new harness. It's quite expensive paying someone to change them out so going with a factory part is probably worth it. Great info 👍

Thanks a ton for the video, I just went through the painstaking process of replacing the knock sensors on a 06 2500HD. I went with the OEM from the dealership (GM Part No.), Bench tested both with a multimeter before install and at various points during installation. So far so good!

Brian best video ive seen in a while!top man

Excellent video Brian with a lot of great info. Knock sensors can be a pain in the arse sometimes. Thanks for sharing all that great smartness.

absolutely brilliant video on knock sensor with additional graphics kept me attentive. well done,.

Very good and easy to understand video. Thanks for the time and effort that you took to help me and thousands of others to understand this simple concept.

Thanks Brian, very informative, very clear, I learned a lot from it.

Thank you Brian. My Toyota Tacoma has a knock sensor P0325 fault. Fortunately it's a 2.7 4- cylinder. With a low profile ratchet i can R&R hopefully with out removing intake. A neahbor walked up and said "hay you got hesitation when you accelerate after shifting down?" I said YES but my scanner said it's the knock sensor. He said he repaced the No.4 spark plug wire and that solves the problem. HOLY SMOKES my spark plug wires are original. Stay tuned and thank you again. Conrad

The technology in use in the knock sensor was invented by French Physicist Paul Langevin in 1917 and was first used to detect submarines underwater. All the components of it had been studied since the 1890's, but he was was the first one to put it all together.

You give great clear info as always. My 06 Cadillac DTS pings it's butt off under heavy load on 93 octane, but no codes. Evidently all carboned up.

I'm gonna share my new found knowledge with the world and seem like a genius. Thanks Brian.

that is very good , I have been fighting my 95 f150 4.9 and this fixed the spark knock!

Dude much respect, You have just educated me and armed me for battle but no seriously man great work and I absolutely love your videos you seem professional but know how to put it in lamens terms for us who don't get it can't wait to see more gm videos and do you have any on cladded avalanche's

I'm doing an ls swap in an old skylark and I kept wondering what those sensors were for! thanks man great video!

any info on sensor placement for instance intake valley versus externally connected to the lower block

Got a po325 on 98 honda prelude. Noticed harness connection coated in oil. Will clean and see if code comes back. If it comes back will replace with oem. Best video out there on knock sensors.

Freaking awesome, best video and knock sensors out there! Do you have a plain clear concise way of explaining everything and it’s easy to comprehend. Wish I could ask you questions about my car. For example, It’s got a knock sensor code and it goes into restriction mode is that common?

Thank you dude for sharing this information with us! All the way to Sweden ;)

Thank bud!!! Great vid and hats off to Mandy.

Thanks bro " very informative and Mandy has excellent videos as well. Dude is full of knowledge ...thanks.

Absolutely the best Knock Sensor Video on KZread! Great explanation!

Love you and eric, thanks for the heads up on apc. Subbed.

Thanks Mister sir I heard about the nock sensor but I had no idea it was such an important piece of the ingine thanks again.

Great video. Thanks for taking the time to make this. Very helpful. Question: Does a P0325 error code indicate a faulty Knock Sensor? Or does it mean that the sensor is detecting knock on the block?

Good stuff Brian. Thanks!

Thanks Brian, helpful for my boat.

Thanks for the great information Brian.

very cool i had no clue about these things till now

Thanks for the info! Curious if you happen to know why the sensors are crimped together top and bottom instead of a single piece?

can I use the after market knock sensor harness? and how critical is it to torque then to 15 fp?

Good job. Very informative video.

Question I have a nitrous fox went with Fitech and a wet plate 100 jet in it can I install a knock sensor to keep a watch on it when I spray ? Where would I install it

Would bad knock sensors cause the truck to not go over 2k rpm? And also for it to die when you rev it and it idles down? But the truck can rev out when in 1 and 2 gear but still struggles in 3 but it also dies sometimes in reverse. Any help would be appreciated. I brought it to auto parts stire and they plugged in computer and it read knock sensors out and clavicle purge valve

Well done , thanks !!!!!

Great stuff Brian.

do you have any idea were a knock sensor is on a 1997 acura tl 3.2 is located on the motor

Does it effects the transmission cause when i changed it the transmission atarted working well...

Thank you so much, incredible video and learned so much . Greatly appreciate this 🙏

Awesome. Thanks for showing us the cut away view👍

Hey Brian Good lesson You have teach us a lot Would it possible for you provide series of lesson on automotive sensors I would truly appreciate your effort in helping us to deep dive in automotive concepts

Do you have any video about crank position sensor?

Man thanks for the information and the knowledge. This helped out a lot.

best explanation so far, great video.

First time I heard about the hydrocarbons building up to cause knocking. Also the reasoning to get the factory part. p0327 came up on my 05 Rainier. Runs fine though.

Thank you for all the information I have a 1994 suburban with 294,000 miles on it with OBD1 , I am getting code 43 I replaced the knock sensor and I am still getting code 43. God Bless you

Excellent explication Sir! Thank you.

I used to manufacture the Knock sensor Body on a multispindle turning machine in the 1990`s when I worked for TRW :)

Thanks for the video. Will be testing mine tonight

Very good video bud! Thanks was very informative and you made it look not so dang hard. Thanks for the help!

I need to know where the knock sensor location n pic for a 1994 nissan sentra sx 200

turbos run on low compression?

hi I have a 03 single cab silverado with a check engine light on it because I need to replace knock sensor is it true if once I replace it, it will give me truck more power and save gas?

Great video, thank you so much for your work..

@briansmobile1

7 жыл бұрын

You're welcome DJ I love to hear it!

Great video. I replaced one on our Honda, only to have it come back on! Now I know why. thanks!

This is a crazy question but I have a 2003 safari van and It has some pinging on acceleration after reaching normal operating temperature . I have a heat shield above the tailpipe that is hanging down on one end and rattling on the tailpipe . Is it possible that the knock sensor is picking this up and adjusting for knock and actually causing it to ping ? Probably not right ! Most likely a bad knock sensor. You say chevy takes two sensors but I have been told the 2003 4.3 V6 only has one ? I also considered The EGR valve as possibly the problem , but apparently the 2003-2005 safari and astro 4.3 no longer have EGR valves but have a different system. Would appreciate any help from anyone on this. For starters where exactly is the knock sensor on the 2003 4.3 v6 ? Been told it's on the back of motor others say the lower side some say under the intake ?

Back in the day... there have always been 2 knock sensors for your engine. They are installed on your head. One on the left and one on the right, typically. Their effectiveness was determined by each persons exposure to and duration of very loud noises like rock music, heavy equipment, etc. Mine are 60 years old and still work, although I do have some ringing in them now. He he...

Brilliant idea , thanks for sharing

Hey Brian if I over tighten the knock sensor and it spins within its self did I break it? I did it in a 92 Chevy truck 350 5.7

Hey Brian how are you thanks for the information but I had a question for you, do you know if the knock sensor can ge damage if the wire harnes get naked (wires exposed or not isolation) and hit or make contact with the engine or body of the car ? Thanks for the answer in advance and hopefully you understand me

question! if there is a knock, does the pressure in the cylinder rise above what would be the maximum created under normal (ie without knock) conditions during the entire cycle?

@11:11 how do you test the voltage going to the Knock sensor from the computer?

Cheers man, just about to try and replace one of these on my girls car and now I actually understand what it does.

Thank you for showing me how to test the new ones. I was worried about the amazon acdelco products being good right out of the box.... ok, plasitc bag....

Very informative video ... Engineering is a amazing thing

Great information for sure.

So much fail here. The reason old cars don't have knock sensors is because they don't have computers so there's nothing for the sensor to 'talk' to, not because of the compression ratios. Plenty of old cars had knock problems for various reasons and some old high performance engines had higher compression ratios than some new engines. "low octane fuel doesn't burn completely, doesn't burn easily"; these two statements are completely false, low octane fuel ignites more easily than high octane and generally will leave less residue than high octane will. High octane fuels often have other additives to help reduce the left over residues so that they're not left in the engine, but they can still be dirtier burning than low octane fuel. High octane fuel reduces the likely hood of detonation because it is harder to ignite than low octane fuel. Detonation caused by carbon and self ignition as you described with the campfire effect can't be eliminated by a knock sensor retarding the timing since the spark isn't what's igniting the fuel, luckily this doesn't happen much with modern fuels and modern engines. "gotta have higher compression ratios if you wanna run turbo chargers and superchargers" Another thing that could be no further from the truth. Compression ratios in supercharged and turbo charged engines is almost always lower than in naturally aspirated engines to allow more power with reduced chances of detonation.

@danielb3552

7 жыл бұрын

his brain is fried

@danielb3552

7 жыл бұрын

considering the knock sensor is an electrical sensor. shouldnt i be able to open it up and repair it myself by replacing the piezoelectric crystal and the weight, wich ever is faulty. i think i can do it

@DonziGT230

7 жыл бұрын

Theoretically yes. Getting inside, fixing it, and resealing it would be pretty tough. Make a video if you decide to try it. I just replaced one and may tear into the old one just to see how doable that would be, but the way it's mounted on the motor I was working on (big job to get to it) I didn't want to experiment so I went with OE from the dealer.

@angelaflorian5005

7 жыл бұрын

DonziGT230 +

@keantoken6433

4 жыл бұрын

@@danielb3552 If you didn't have the right crystal it would probably be too sensitive or not sensitive enough. Assuming the crystal is fine, the spring could weaken over time or the seal could fail causing the resistor or something else to corrode. I do wonder what is the cause of failure.

Thank you for putting up this video , make me more to understand about the knock sensor work It’s very good video and very good explanation Can I ask you a question This knock sensor which we have to test resistance I saw another video it said that if the knock sensor has a resistance is bad sensor, is it true

Thank you sir! Very interesting and helpful. :)

Great video Thanks allot Does my car have knock sensor Opel Astra G 2000 1.2CC

Thanks Brian, subscribed to Mandy's channel

Great explanation about the knock sensor really help me to understand why my car have one

Do the 2006 3.3 dodge grand caravans have knock sensors. ?

You're video on smoking engine was great too. I'm losing water and oil with no visible leak. Rebuild or junk it? 2005 Sioverado 5.3 crew cab 4x4 with 195k miles

Hey Brian I had a question. When you said you ruled out the knock sensor on the 5.3 did you mean that it was the problem? Cause I'm having the exact issue on my 5.3 at 70mph that I'm currently trying to diagnose and only can get it to do it at that speed. And also I saw you at the Utah auto expo by the Nissan Titan diesel!!!

Thanks for your video & time man!

Great job thank you, very well explained

great information in this video thank you

Can this cause idle issues...like a low idle and a surge? I have an 07 Subaru Impreza outback sport I cannot find a TPS or a AIC sensor...my last stop is the MAP.

Awesome video!!! Just one question: what does the letter on the bottom of the bolt mean (e.g. "A" and "C")?

What up friend I change my knock sensor on my 01 chevy silverado but code still come back anything else thatbo can do to fix that

ADP training, very good info there, also he has a range of books that are also good.

thanks for the info dude now im going to replace the sensor mine never did it all the time but once in awhile it would in a certain temprature untill 30 seconds into warming it up

Great stuff, thanks ! So the knock sensor "hears" pre detonation and adjusts timing. What keeps it from "hearing" a normal detonation and then doing its thing? I.e. How does it tell between pre detonation and normal detonation?

@jakegunter25

8 ай бұрын

Normal detonation is relatively tame compared to pre detonation. This is because normal "detonation" is actually conflagration, much less violent than actual detonation

I have a similar problem. I replaced my sensors and harness, but I still get low voltage codes on both sensors, but only after driving on the highway. Are they bad sensors, it the threadlocker causing it?

Is it possible to hve knocking oonly in clod start ? ,,after all day on part start like cat smooth and quite, but early morningnext day i hear 1-2min of knocking...Any tip pls?

what are symptoms of knock sensor....i looked at '02 honda CRV today and it sounded like the lifters or something was knocking......so i didnt buy it...would knock sensor sound like something knocking in engine....?

THANKS FOR THE INFO. AM I UNDERSTANDING THIS CORRECTLY? ARE THE KNOCK SENSORS ESSENTIALLY USELESS? I DRIVE AN 06 25OOHD GMC. IF PREIGNITION IS AN ISSUE WOULDN'T ENGINE PERFORMANCE SUCK AND RUN A BIT ROUGH?

Hey Brian that video was great. I know it’s been a while but would you still have the video about the Silverado. I have an 03 that I changed to KS’s on (used AC Delco ones) because the engine was pinging unless you put 93 octane in it. Now it don’t ping with 87 octane but the MIL is on for “low input”bank 1 &2.

Best in-depth explanation of knock sensors I've seen so far! 8D

Brian! Not the one to be picky because I love your informative videos, but you said turbo cars and supercharged cars want higher compression ratios. Technically they want lower compression to reduce strain in the bottom end (talking specifically petrol cars), hence the reason of not being able to turbo factory non turbo cars. Though a higher compression ratio on low boost pressure (turbo/supercharged) is much more efficient then it's N/A version with the same compression ratio (hence, where the diesel cars fit in)

@jeepmanxj

9 жыл бұрын

Nik Trp This. Also, low octane fuel doesn't leave burnt deposits in your cylinder, any fuel can, specifically lower quality gasoline regardless of octane.

@briansmobile1

9 жыл бұрын

Nik Trp I should have known that. Thanks for bringing that up.

@briansmobile1

9 жыл бұрын

User Name It's incomplete burn. That could be many things.

@jeepmanxj

9 жыл бұрын

briansmobile1 agreed, even oil entering the center. However on an otherwise healthy engine my first choice is poor fuel.

@samuelcorbett243

9 жыл бұрын

Nik Trp When he said that I was waiting for someone to say this. I don't agree with you, he was technically correct. If you are talking static compression ratio (CR) then yes, forced induction (FI) wants a low CR. However what really matters is the Dynamic CR, which on a FI car will be (almost always) higher than the N/A version. The static CR is a fairly useless term when talking about pre detonation.

Excellent video!