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Discussion Starter · #1 ·
It is probably been asked before but what would cause a cold engine misfire that mostly goes away as temp rises on t.b.i 4.3 in an 89 Chev pickup? I replaced cap and rotor and no improvement. Exhaust looks real clean so maybe it's a lean out issue? Gas milege is not getting worse also. Thanx ,Clint
 
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