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4* of KR what do you think is causing it??

JcGTP39

JcGTP39

New member
Alright the other day I tested my car with my scanner and did a KR sensor scan, just to see if I still have any KR after I just put headers on and 3inch full exhaust.. So all my mods are listed in the bottom box and i check my fuel pressure at idle its at 50psi then at WOT its 62-64psi. Before the headers she had 7* of KR now shes down to 4* for fuel all I run is shell 93, but this weekend im going to try something and see if it helps out any im going to get down to 1/8 tank of fuel then get two gallons of 110 octane and see if helps the KR at all cause if it doesnt then it could be some false but I will find out. I just wanted to see if you guys had any other ideas on what is should do or test. So let me know thanks.
 


When does it knock?

All the way through the power band or just at the top of shift. Does it just spike to 4 and go away?

I also say get a real tune now, that ZZP tuned pcm may not be cutting it.

Also knowing AFR at WOT would help.
 
I dont really feel anything smacking, I know the cross over pipe does come in contact with the tranny dip stick and does create a little vibration.
 
When we did the test it spiked at 4 once it hit 3500-4000 RPM and stayed between 3 and 4 didnt go to zero. Im going to do another scan tmrw and ill get you the AFR at WOT as well. But yeah i was thinking about maybe getting it dyno tuned and see if thats would get rid of it all.
 


You have a wideband o2?

Otherwise a scanner, like say a Tech 2 or somethnng wont know what it is really, it'll just tell you what the computer might be commanding.
 
Yeah I have a snap on Modis scanner that will pretty much tell me anything. Yeah I kinda figured it might be real KR but you never know
 
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