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  #1  
Old 01-25-2010, 07:21 AM
greg8p greg8p is offline
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Default fast idle not working

I have a '02 Ranger 4.0 engine. This has been bugging me for awhile. When I first start it after it has been setting for awhile like over night the fast idle does not work.I can get it to fast idle by pushing on the accelerator once it starts. Then it will fast idle for a bit like it should and work its way down. Any suggestions what might be causing this.

Thanks for any help. Greg
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Old 01-25-2010, 02:03 PM
modelageek modelageek is offline
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you could probably start buy cleaning the iacv. I am not sure if that is your issue or not but it is cheap and easy to do. the coolant temp sensor can mess with the idle also.
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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Old 01-25-2010, 04:49 PM
greg8p greg8p is offline
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I actually have already replaced the iac valve a while ago hoping that would help. No luck though. Thanks for the suggestion on the temp sensor.
Greg
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Old 01-25-2010, 04:57 PM
modelageek modelageek is offline
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I wonder if resetting the pcm will help. You unplug the battery for a short period of time
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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