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  #1  
Old 12-29-2010, 04:23 PM
merckx72 merckx72 is offline
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Default Terrible idle 2001

2001 will not idle. Very rough when it does like someone has kicked the truck you can see it move around it idles so rough. Stalls a bit. Have to idle one foot on gas and one on brake to keep it going at light. Seems to drive fine otherwise.
Any ideas?
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  #2  
Old 12-30-2010, 06:33 AM
crowdpleazer crowdpleazer is offline
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Default Re: Terrible idle 2001

IAC problem?
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Old 12-30-2010, 08:25 AM
mcpink mcpink is offline
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Default Re: Terrible idle 2001

Can't hurt to clean the IAC, it's quick and easy. Might also want to check for a vacuum leak.
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Old 12-30-2010, 08:41 AM
01DangerRanger 01DangerRanger is offline
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Default Re: Terrible idle 2001

if you have a light gun, you can check if all the spark plugs are firing cus if they are not then you pretty much having a mis-fire and only using all your cylnders some of the time. this happened to me. mine happened to be fixed by a new coil pack
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Old 12-30-2010, 07:32 PM
crowdpleazer crowdpleazer is offline
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Default Re: Terrible idle 2001

and it would be a good idea to pull out a couple plugs and see what kind of shape they are in. how long has it been since the plugs/wires were replaced
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1998 ranger extended cab, 2wd, 4.0 ohv, 5 speed, sony xploid 52 4 way watt radio, 2 pair of pioneer 240 watt speakers, Cobra 29 LX LCD CB radio pushing 100 watts, k&n air filter, 15 inch exploder wheels, dual exhaust with 4 inch stainless tips, 2 12 inch subs with a 1000 watt amp just for the hell of it!

new project: dirt track modified racing at the local saturday night track.
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  #6  
Old 12-30-2010, 07:34 PM
pooleo pooleo is offline
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Default Re: Terrible idle 2001

egr valve. My plow trucks egr did the same thing, idle like shit, run down the road perfect. The top of the valve had rotted off.

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I would take it off, make a gasket to block the hole, put it back on and be done with it.
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  #7  
Old 01-05-2011, 02:10 PM
Jazz921 Jazz921 is offline
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Default Re: Terrible idle 2001

Take the throttle body off and clean it. Had mine do that same thing and found that the gap around the plate inside the throttle body was blocked off with carbon gunk. This plate is closed when at idle and when gunked up it will starve the engine but will seem to run fine when accelerating. Should die or try to die when you put the truck into park as well.
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