Question about 2000 GMC Jimmy

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I have a S-10 with 88,000 miles 4.3 V6. I went outside and truck won't start. So I sprayed starting fuild and got the truck started. But truck is back firing and running bad. Is this the timing chain or something else.

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Timing gear, or timing belt, sometimes you find a plastic timing gear with broken teeth off of it, if you can believe that, sounds like a timing issue, sometimes you can take and move all the spark plugs wires on the distributor in a clockwise rotation, just move them around, keeping them in the same firing order, just advancing the spark without loosening the distributor, and see some improvement

Posted on Feb 24, 2009

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