take off IAC, spray it with carb cleaner, reset . I would start there. Next I would be looking at fuel filter.
- posted
20 years ago
take off IAC, spray it with carb cleaner, reset . I would start there. Next I would be looking at fuel filter.
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)
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98 Camaro
approximately
distributor
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 start again.
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