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Old 12-25-2010, 05:35 AM
blueovalhawkeyefan blueovalhawkeyefan is offline
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Join Date: Jul 2009
Posts: 19
Default Miss at idle speed 99 4.0

First off I am not a mechanic by any means.Problem all started with CEL.Changed plugs with motorcraft platnium and wires and had new upper intake gasket replaced.Cured CEL but I have this miss at idle really noticeable in drive at stop signs,red lights sometimes I can feel a sputter cruising down the road at a steady speed.Noticed my mileage has dropped a little but I'm thinking,hoping that it's due to the colder weather here.If someone could offer some suggestions to what I could look for I would really appreciate it as this sputter really bothers me.Seems to accelerate really good,also changed fuel filter and pressure is good.Also cleaned MAF.Some one has suggested EGR valve?If anybody could help with this I'd really appreciate it!!
/93 ranger xlt 4wd 310000 and countingSOLD
my all original suv
/96 explorer xlt 4wd 170000 and counting my nice ride
/99 ranger 4.0 xlt 117000 red and sexy
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Old 12-25-2010, 09:36 PM
Giangrosso Giangrosso is offline
97 ranger
Join Date: Apr 2010
Posts: 106
Default Re: Miss at idle speed 99 4.0

i have this issue occasionally on my truck, i just put seafoam in it, it helps it out
97 ranger, 2wd, auto, 4.0, not afraid to follow a z in it
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Old 12-25-2010, 09:39 PM
DiabloBlanco DiabloBlanco is offline
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Join Date: Nov 2010
Posts: 6,402
Default Re: Miss at idle speed 99 4.0

yeah clean your throttle body and MAF should clear it up a little.
YZ the way to be!
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Mods to come: Camburg entry 6.0 system. FiberwerkX Fenders and bedsides. Tube bumper.
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