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  #1  
Old 06-24-2011, 03:22 AM
bubba4295 bubba4295 is offline
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Default Rough idle.

2002 w/4.0. 178,000 miles. Well maintained.

Fuel pump went out recently and had it changed. Shortly after this the truck stalled out. I got it started and it seemed to run ok. Changed fuel filter. Now it hardly idles. when stopping at stop sign have to put it into netural and increase the rpms manually to keep it running. Runs fine under power.
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Old 06-24-2011, 03:25 AM
Rango88 Rango88 is offline
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Default Re: Rough idle.

Hvae you done any other maintenance recently?
Spark plugs,
spark plug wires
Engine coils
Clean IAF and MAF?

This are potential elements that could affect idle.
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Old 06-24-2011, 03:35 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: Rough idle.

Any CEL codes?
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2001 Ranger 4x4 Stepside
-RCD Suspension lift
-33x12.5 BFG KM2's on Mickey Thomson classic locks
-4:56 gears
-Auburn gear LS
-James Duff traction bars
-Headers
-Flowmaster duals
-SCT X-Cal2 and some small exterior mods

http://www.cardomain.com/ride/2321189

2005 F-150 Lariat 4x4
-LED third brake light
-Weathertech floor liners
-Edge tuner
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Old 06-25-2011, 03:27 AM
bubba4295 bubba4295 is offline
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Default Re: Rough idle.

No other maintainance done. Small emmissions control leak code,
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  #5  
Old 06-25-2011, 06:02 AM
north44 north44 is offline
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Posts: 77
Default Re: Rough idle.

First fix the stuff you know isn't right - you'd be surprised how something so seemingly "small" (e.g., a "small" vacuum leak) can lead to all sorts of symptons/problems or trigger any number of codes.
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