Knock Retard

[jdearles]

Ok I finished my head, cam, long tube, therm., and plug wire install. My question is now I have 4-5* of knock retard :hammer: at WOT where I had none when the car was stock. Is this a tuning issue or an install issue?

Can I tune this out? Do I need to take the car apart again and re-do something? Or could something be loose and it just needs to be tightened down that may be setting off the sensor (ie exhaust)? I would like to get this issue resolved.

The car is definitely stronger now with the install but I think it will be stronger if I can get rid of the KR.

Thanks
Jon

[Ed Blown Vert]

You need to get it tuned. You are most likely running lean.

[BIG D's SS]

:werd:

[jdearles]

I am trying to get an appointment with TR but there was a hurricane there recently...

[BIG D's SS]

Sounds like that Bad Luck might be rubbing off.

[shady1504]

I've had up to 10* of knock retard at WOT but I only did a long tube install.

[GatorSS]

Get HP Tuners and tune it yourself.

[jdearles]

Get HP Tuners and tune it yourself.


I have HPTuners, I guess I need to get the wideband to tune it myself.

[jdearles]

OK guys...This is what I have found out. My Y-Pipe is knocking on the brace. I am working on getting the exhaust hanger back on the car.

I am curious...I did 2 back to back WOT logs. I logged 0 KR on the first run to 100 and the second run to 100 I logged 4* of KR. Could it be because of the Y-pipe or would true knock come and go like that?

While driving the car is when I heard the rattle under the car and checked to find the rattling Y-Pipe.

[Ed Blown Vert]

Yes that could cause a false knock.

[Soltakr]

I'm glad to hear that I'm not the only person that has a y-pipe hitting the floor pan. Right under the diver side.