First thought while reading your post was O2 sensors, since they don't
effect the ECM until heated. Are you getting any SES lights? The backfire
would usually indicate bad timing (basically, the chain if high mileage) or
faulty ignition. When was the last tune up? (plugs, wires, cap, rotor)
Thanks all for the replies. The SES light doesn't come on when this problem
occurs. I Replac3e the plugs, plug wires, cap, and rotor wwhen ththis
problem first started happening.I cleaned the IAC per Just Brilliant's
sugestion. It was pretty coked up, but the problem happened again this
morning. The frustrating thing is that the car ran just fine all the way
home this evening. I'm thinking about replacing the spark control module for
the next step. any ideas?
Check your electronic ignition module. I had a similar
experience with my 92. Had to wait for it to finally
get bad enough to find it. Mine backfired so bad it
blew a hole in the muffler (a recently new one). The
backfire was caused by fuel build up in the exhaust while
the sparkplugs were not firing, then all of a sudden would
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