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94GSX
11-16-2004, 03:52 PM
I just just hooked up a pocketlogger to my car and found that it is showing knock, about 6 starting at 4500rpm and goes to 20 by 6500. Starts to show knock as soon as I push the throttle after about 1300rpm. My timing is around 15* and my o2 is at .82. Fuel trims are hi=136%, med=139%, low=139%. My car is bone stock 94 gsx. Any suggestions? I don't understand why it would be reading knock.

sbiggi
11-16-2004, 04:25 PM
Well.... according to your fuel trims, you are probably running lean.

Start by checking your base timing with a timing light and check for boost leaks.

98GSX
11-16-2004, 06:55 PM
I had a freind with the same problem as you. He had to go with a AFC and richen up his top end. No idea why but it did fix the problem. Good luck!!

Chris