Replacing my knock sensors

[Duke Silver]

279092681252008661

Expires Oct. 18

Type it in to where it says, "how did you hear about us" and hit "enter" and you will see the parts price total change.

Thanks

 

[Duke Silver]

Why not lead him to the thread?

Rock Auto Discount Codes - Post 'em Here for Others to Use

Sept 6 27486975398013963 Thanks for keeping us with this Ron, you helped to save me $79 today.

www.tahoeyukonforum.com

Thanks for the thread link for future reference

 

[Duke Silver]

If you really wanted to something else extra replace the valve cover gaskets if they are leaking, that's more common than anything else, those I would use the fel pro also and they come with new grommets

Thanks for the heads up, I am definitely going to change them. I have a build up I noticed when I first bought the car, not a steady leak but they definitely need to be changed.

 

[OR VietVet]

You're SO dependent on others to cover for you.

That, and I am lazy at times.

 

[waveryd]

Might also consider a 1 year subscription to alldata DIY if you are just learning. It is well worth the cost as it will save you time and all the procedures, torque specs, etc. are readily available vs. searching for everything individually. As stated above I have also had very good luck with Rock Auto.

 

[Duke Silver]

If you really wanted to something else extra replace the valve cover gaskets if they are leaking, that's more common than anything else, those I would use the fel pro also and they come with new grommets

Thanks for mentioning that, I forgot when I first purchased the vehicle I can see the build up of oil around the covers. There's no steady leak but they definitely need to be replaced. Put the order in this morning and I added those as well.

Thanks again everyone for your help, I appreciate it.

 

[OR VietVet]

Thanks for mentioning that, I forgot when I first purchased the vehicle I can see the build up of oil around the covers. There's no steady leak but they definitely need to be replaced. Put the order in this morning and I added those as well.

Thanks again everyone for your help, I appreciate it.

How much did the 5% discount save you? Sometimes, the savings pays the shipping.

 

[Duke Silver]

How much did the 5% discount save you? Sometimes, the savings pays the shipping.

I think it was close to $11 if I recall correctly

 

[Duke Silver]

I'm replacing The knock sensors right now according to the specs I looked up online and saying 15 ft lbs is what to set the torque wrench too That's what I'm doing and as they were getting tighter all of the sudden they started feeling looser so I stopped and put in the rear knock sensor and the same thing started to happen.

That rear knock sensor was in pretty bad shape as you can see from the pictures.

 

[Duke Silver]

Got the new knock sensors in, naturally not without running into a few problems, but nevertheless is done.

I was hoping this was what was causing my misfire but unfortunately it's still there. I've had this misfire since I've bought the car and cannot for the life of me figure out the cause. I've changed the coils, plugs, and wires. I've done a compression test. I've listened to the injectors and they all are making the ticking noise. Cylinder 3 is the main culprit and it shows slightly on 1. I've swapped the wires and it doesn't move. The plugs have been double checked and they look good. I know my cats are clogged, not sure if that could cause the issue or there's something else I'm missing.

 

[OR VietVet]

What was the compression on all 8 cylinders? You know you have clogged catalytic converters and have not fixed and you are trying to work around that?

 

[Doubeleive]

do a backpressure test, my 3rd cat was clogged gave me a lot of problems before it was figured out.

 

[Fless]

How much did the 5% discount save you? Sometimes, the savings pays the shipping.

Just about 5%.

 

[Fless]

Has a CASE relearn been done? Easy 1 min process with a capable scanner. Sometimes that can eliminate misfires.

 

[strutaeng]

Agree with @OR VietVet here. The cat was damaged most likely because of the continued operation with a misfire.

I think it would have good to know this in the introduction, but at least you still told us.

I believe the website charm.li will have a step-by-step procedure for diagnosing the misfire. It's good you know which cylinder is misfiring. Often times a lot of scanners will just give you a code for a misfire but not cylinder-specific.

 

[kbuskill]

I would check continuity of the short harness that goes between the engine harness and the coils, the one that is attached to the coil bracket. They have been known to have issues.

 

[Duke Silver]

What was the compression on all 8 cylinders? You know you have clogged catalytic converters and have not fixed and you are trying to work around that?

I can't recall a fan I know I wrote it down but I'm pretty sure I lost the paper. I did that maybe two to three months back.
Yeah I know but my problem also is do I drop a lot more money to have those replaced And then if the problem is still there I'm out that money still with the same problem.
I was thinking about temporarily hollowing out the cats doing that trick with the O2 sensors using the defoulers until I can actually get the money I'm to swap the mail this way I can see if the clogged cats are what's causing the issue and how dropping a lot of money.

 

[Duke Silver]

do a backpressure test, my 3rd cat was clogged gave me a lot of problems before it was figured out.

I'll have to look into doing this and see what tools I would need to do it as I've never done it before.

 

[Duke Silver]

Has a CASE relearn been done? Easy 1 min process with a capable scanner. Sometimes that can eliminate misfires.

Not with a scanner I did that method where you connect the two terminals and let it drain, I thought when I saw that that was a way of draining the system memory to relearn everything

 

[Duke Silver]

Agree with @OR VietVet here. The cat was damaged most likely because of the continued operation with a misfire.

I think it would have good to know this in the introduction, but at least you still told us.

I believe the website charm.li will have a step-by-step procedure for diagnosing the misfire. It's good you know which cylinder is misfiring. Often times a lot of scanners will just give you a code for a misfire but not cylinder-specific.

Yeah sorry about that, I only recently discovered that the cat or cats were clogged due to that rattling noise coming from underneath. It wasn't doing it prior to maybe 3 to 4 weeks ago, not really keeping a timeline so it's a little fuzzy.

Unfortunately I don't have the expensive scanner tool that does that but I know somebody that does that's how I found out that it was on the third cylinder mainly and slightly on the first cylinder.