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Old 06-17-2007, 04:30 AM   #1
carls47807
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96 sonoma ignition advance problem

Hey guys,

I have a question for you.

I have a 96 sonoma, 4.3 4wd. I'm having a problem with it and i think it is a timing issue. It runs smooth, but it doesn't seem to have any power.

I hooked up my actron and it consistently shows an ignition advance of -6 to -30 degrees. What could cause the computer to retard the timing so much? The knock sensors, and ignition module are new, and i'm showing accurate temperature readings from my coolant temp sensor and air sensor.

The timing can not be manually adjusted, and the MIL light isn't on.

Please, any help/ideas would be greatly appreciated.
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Old 06-18-2007, 04:42 AM   #2
BanffAutoSpa_ap
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any codes?
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Old 06-19-2007, 10:26 PM   #3
carls47807
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it's run pretty hard, i pull a boat with it and every once in a while it will throw a trans temp sensor code. i don't think it is related, but you never know.

other than that no other codes. i pulled the distributor the other day to check the gear and placement, and everything seems to be in right. i notice that as rpm's increase (even in neutral), the timing retards from -6 to about -30. i just can't understand why it would be doing this, the engine isn't pinging and i'm running 89 octane. all the live data from it is up to spec, except for the timing, calculated load doesn't go over 30 - 45% when I am driving it either.

thanks for the post.
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