SPARK KNOCK will not cease...even with tune up! - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > SPARK KNOCK will not cease...even with tune up!

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Unread 01-15-2003, 04:26 PM   #1
wwevans
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Join Date: Oct 2001
Location: OK
Posts: 29
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.

thanks,
Billy

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Unread 01-15-2003, 04:59 PM   #2
Beachead19
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Unread 01-16-2003, 10:10 AM   #3
automan25
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Perhaps the knock sensor has gone bad?
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