Runs good cold but when it warms up misses and backfires could it be the ignition module
What is your question?
The longer I drive it the more it misses but if I shut it off for a couple minutes it will run good for a couple miles then start missing again I've changed sensors plugs wires cap and rotor
What makes this problem better or worse?
When it's cold
How long has your 1994 GMC C1500 had this problem?
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Hello, I wouldn't guess at the ignition module, but with misfires and backfires - the ignition system itself isn't ruled out. I'd probably lean more towards emissions controls and air / fuel mixture ratios, which can be off for a multitude of reasons. - Some hands on testing analysis by at technician with proper equipment and workshop manual resources is needed.
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