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Old 08-07-2010, 11:39 AM
Galazza Galazza is offline
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Join Date: Aug 2010
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Question Idle runs up and down at starting

when I start my 1999 4x4 , 4.0, the engine IDLE sometime goes up and down (500rpm to 1500 Rpm) in cycle for at least 30 seconds becaming usually stable after that. In addition when the truck is running and coming to a stop, the idle takes a while to come down to a 700-1000 RPM range and stays high for a while. In general it sounds to me that the RPM is a bit high. It started doing that in the last couple of weeks....before that it used to be running fine. Any suggestion on the cause of the problem?
1999 4x4 Ford Ranger, 4.0 L , 6 cylinders, extended cab, manual transmission

Last edited by Galazza; 08-07-2010 at 11:28 PM.
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Old 08-07-2010, 12:18 PM
beef08 beef08 is offline
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Join Date: Mar 2010
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Default Re: Idle runs up and down at starting

had the same problem in my honda accord i think i might have been the pcv valve but could be wrong
"I thought this was America!"-Randy Marsh

2003 fx4 4.10, maxed tbars, 5000k HIDS 3157 silverstar bulbs, expo ohc, alons mag light holder, 06+ tails, throttle cable mod, air box mod
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rpm high

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