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My buddie's 92 245 backfires upon startup...white smoke comes out of the air cleaner box and we can hear the detonation in the muffler.
We exchanged the AMM with a known good one...still backfires.
We exchanged the ECU with a known good one...still backfores.
Suspect:
5 months ago, he had the timing belt replaced, but the shop did not have him come back at 600 miles for a retightening....
Could this have caused the belt to slip a cog or two and so throw off the timing enough to backfire?
gracias for any help.
el Raidman
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