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What can cause false knock...

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Old Feb 2, 2003 | 12:08 AM
  #1  
Jekyll & Hyde's Avatar
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Joined: Sep 2002
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From: Dallas/Fort-Worth
Car: 1988 Camaro IROC-Z
Engine: 350 TPI (L98)
Transmission: T56
Axle/Gears: 9-bolt 3.45
What can cause false knock...

Well I finally got a chip made for my car with the proper fuel constants. Before I was running way to much fuel, and still receiving 47 counts. Well with the new chip in, and 87 octane fuel, the counts reached 72 one time.

I know that I am picking up false knock, but I just wanted some more things to check. I know that I have been running rich for a while, and that could cause build-up and hot spots. Also, the exhaust taps the bottom of the subframe connector crossover.

What are some others, I would like to check everything if possible.

The chip is the stock bin with the proper fuel settings. I haven't even changed the primary fan temp, that is how stock it is.

TIA

Last edited by Jekyll & Hyde; Feb 2, 2003 at 12:11 AM.
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Old Feb 3, 2003 | 11:50 PM
  #2  
jeffsbluez's Avatar
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Joined: Jan 2003
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Car: 91 z28
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
I had a false knock when I put my car back together. It was because of the exhaust hit the frame constantly. It pulled up to 20 deg of timing out and cost me 50+ hp. Try using a higher grade of gas. You might have to much timing programed into the chip. Just giving you some food for thought
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