Question about 2001 Jeep Grand Cherokee

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2001Jeep Grand Cherokee 4.0l Idle at start up

When starting i have to hold down gas pedal to keep running for about 10 minutes the the car will idle ok.

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Check the 'idle air control valve' which is mounted on the throttle body. It sounds like it is not functioning properly, it's about a $75 part.

Posted on Jun 28, 2009

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Possible trapped air pocket. Set to full heat position, lowest fan speed, remove rad. cap, start engine and let idle for 10 minutes, then hold gas pedal at 1500rpm for two minutes then let idle for two minutes. Shut engine off , let cool for 30 minutes. Top up coolant level and reinstall cap. Drive vehicle, should get heat now.

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if you can keep it running by pressing on the gas pedal then clean the idle air control valve, IAC.
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1998 Jeep Grand Cherokee has a rough idle at first


You do have a filter and it's mounted right on top of the pump on outside of tank...it is also the pressure regulator. You really should put a pressure gauge on the fuel system and check it out though. you may find there is a problem elsewhere. Good and proper testing is the only way to get answers about problems especially now that systems are all electronically controlled.

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Wont hold idle will start with foot depressing gas pedal will run with foot on gas but stalls when foot removed


Check and clean Idle air control valve. Make sure its responding to signal as well. Also make sure ther are no vacuum hoses disconnected. This may not be a "cure" but it's a good place to start.

Apr 14, 2009 | 2001 Jeep Grand Cherokee

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Won't idle


The problem could very well be your Idle Air Control Valve. If you're a handy person it costs about $40.00 and takes 10 minutes to replace. Best way to check it is to unplug it while it is running. If the valve is bad it will keep running. If it is good, unplugging it will shut the engine off, and that means it's doing its job. Happened w/ my dakota and I'm about to replace it in my Grand Cherokee.

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