rough idle, popping, 98 3.0 - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-11-2012
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rough idle, popping, 98 3.0

my 98 3.0 isn't running right. it shudders, pops and shakes. I checked the coil pack and the wires are getting spark. code pulled says c3 misfire (p303). unplugged the MAF while truck was running and didn't make a difference.

leaning towards injectors (although I ran some cleaner through the gas tank) or a new MAF but would like to know what yall think before I do anthing.

thanks yall
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Old 01-11-2012
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Have you checked for a cracked plug?
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Old 01-11-2012
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no, but it is an irregular miss. doesn't that rule out plugs?
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Old 01-11-2012
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Not necessarily. I just had the same problem in mine. Turned out that I had a plug with a bad crack. I only noticed the problem under moderate accelleration. Under light throttle, it was running smooth. I was sure it was something else, until I found the cracked plug.
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Old 01-11-2012
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the misfire is a little more severe. but I'll check it later on and let you know.

also I don't know if this changes anything, there is a smell from the exhaust, like it's running rich.
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Wirelessly posted (Blackberry 8530)

Sounds exactly like the symptoms I was having.
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