Steve01984
TYF Newbie
Was setting knocksensor codes. Fully replaced them and harness. Still setting bank w knock sensor code. But shes a dog. Whatelse do i look into. Allready replaced fuel pump. Due to other problems with tank.
2002 tahoe. No power from take off.
- Thread starter Steve01984
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wjburken
Supporting Member
Welcome to the forum from Iowa.
Why did you replace your knock sensors and harness?
Why did you replace the fuel pump?
What is the condition of your plugs and wires?
What octane of fuel are you using?
Did this just start happening or has it been gradual?
How clean is your throttle body?
How old is your fuel filter?
Those are the first questions that come to mind, but there are other things that could be checked as well.
Welcome to the forum from Oregon.
What @wjburken said. Answers to all these and have you had the catalytic converters back pressure tested? What test results did you have to replace all of these parts?
We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.
If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.
What @wjburken said. Answers to all these and have you had the catalytic converters back pressure tested? What test results did you have to replace all of these parts?
We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.
If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.
Joseph Garcia
Supporting Member
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- Aug 2, 2018
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- 8,192
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Welcome to the Forum from NH.
You've already received your first replies with a great set of questions that will help members here understand more details associated with your issue, and subsequently provide you with recommendations.
You've already received your first replies with a great set of questions that will help members here understand more details associated with your issue, and subsequently provide you with recommendations.
Sounds like possibly clogged cats to me. That can cause all sorts of issues and codes including knock sensor, misfires, MAF sensor, etc. and your truck will feel like you’re driving through knee deep mud. I would get a flow test like Ron mentioned.
Steve01984
TYF Newbie
Truck has 200+k. Miles. Some replaced one knock sensor in the past. And i got a cod for rear knock sensor. So i replaced them. And replaced fuel pump for bad level guage. I run just reg gas 87 i think. I have a cold air intake on it. But thats it. Basically rest of truck is stock. Now its saying p0327 is pending. I was gonna just try a fuel pressure regulator. I also replaced knocksensor harnes pigtail cause it was all coroded inside
Steve01984
TYF Newbie
Steve01984
TYF Newbie
Sorry guys still figuring out the forum and how to navigate it. Sorry for confusion.
No problem.
Steve01984
TYF Newbie
Is there a way to diagnose cat with out flow test. I called around yesterday and no one local has proper equipment? I was told maybe pull upstream o2 sensors and see if power comes back.
