random multipule cylinder missfire
#1
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random multipule cylinder missfire
It only missfires when you put load on it IE; passing or going up hills, but other times runs smooth. The engine has about 175,000 on it, has new plugs, wires, coils, and icm. It does have some codes the random multipule cylinder missfire, o2 sensor after the cat, and egr flow insuficent. Next week the cat is going to be replaced with straight pipe and egr deleted, those have been planned for a while. What could cause this ? fpr ?
thanks
thanks
#3
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It had a Bosh lifetime warranty fuel pump put in last summer, and new fuel filter last month. How do I check fuel pressure? I dont have a gauge.
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Okay. Also, I forgot to add that the problems getting worse the longer it goes without fixing and when it does this the trac off light comes on and check engine lights starts blinking.
thanks
thanks
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The blinking SES light is the misfire, nothing to worry about there. I would suggest taking off the coils and the ICM and clean up any corrosion that might be there. Then use a little dielectric grease when you put it back together.