SPARK KNOCK will not cease...even with tune up! -
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post #1 of 3 Old 01-15-2003, 04:26 PM Thread Starter
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Join Date: Oct 2001
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SPARK KNOCK will not cease...even with tune up!

I am getting a bad spark knock with the recommended 87 octane even when I have had a BG air/induction cleaning and major tune-up...mostly happens upon acceleration or when engine has a load on it (like going up a hill). Computer has been reprogrammed and we don't know what else to do with it. I have the 2000 JGC Laredo 4x4 4.0 liter and the dealers are puzzled like I am...please help or any suggestions.


Keep Jeeping!
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post #2 of 3 Old 01-15-2003, 04:59 PM
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Check your local lemon law...I smell citrus.

98 ZJ Limited I6
Kolak Ignition
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post #3 of 3 Old 01-16-2003, 10:10 AM
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Perhaps the knock sensor has gone bad?

1993 ZJ Limited 5.2 - no mods - Red with Gold (what were they thinking) trim.
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