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2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 06-25-2008
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rough idle..

I changed out all of my spark plugs yesterday. Not bacause they needed to be, but because it had been 6 months since the last change. Anyway, now my truck has a slight miss at idle. Not really a continuous miss, just misses every 10 seconds or so. Before this, the truck was idleing very very smoothly. I changed the wires also, and re-checked the gap.(.044) No CEL is on, and no code can be found at Auto Zone. Any ideas?????????????
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Old 06-25-2008
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did you put bigger wires on it?
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Old 06-25-2008
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Haha i'm dealing with the exact same problem right now, put new wires and plugs on and it runs worse. Good Luck fixin it
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Old 06-25-2008
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Originally Posted by 85_Ranger View Post
did you put bigger wires on it?
Don't think so, they gave me the wires that I asked for. (99 ranger 3.0 FF)
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Old 06-25-2008
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Originally Posted by My91Ranger View Post
Haha i'm dealing with the exact same problem right now, put new wires and plugs on and it runs worse. Good Luck fixin it
I know..this sucks!!
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Old 06-25-2008
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huh cuz my 2.3l did the same thing cuz i put 8.5mm wires on it, and it made the tach jump really bad, but when i put the stock ones back on it was fine.....
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Old 06-25-2008
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A mechanic friend of mine told me to check all the plugs for cracks...thats more knuckle busting work. ARGH!!
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Old 06-27-2008
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Well, I talked to a friend of mine, and he said that he went to Autolite Double Platinum as well, and that his car started doing the same thing. So I went and got some Autolite Platinum plugs and chenged them out. took care of the problem. Crazy how the cheaper plugs made the truck run better. Might be something to try if your having the same problems.
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Old 06-27-2008
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Hmm that's interesting there, glad you got it worked out
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