Question about 1998 Jeep Grand Cherokee

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98 LAREDO idling at about 2400 rpms

When started the engine holds at about 2400 rpms as long as it is in park but when it is put in gear the rpms drop down to the normal amount, only tries to take off quickly. On the highway it wont go into overdrive, but the check engine light doesn't burn.

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I would start looking for a vacuum leak!

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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1999 mitsubishi montero sport. Randomly started hesitations and low rpms in gear at idle. and highway speeds dropped rpms slightly and when let off accelerater rpms drop too quick and low. Any ideas?


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it sounds like a vacuum leak to me, my car had the same problem but when i changed the hose that connected the valve cover to the fuel injectors the rpms dropped back down to about 800 rpms

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I have a 1992 Chevy pick up 1500 series. 350 engine. The idle is running low on it, were and how can I adjust it?


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The idle drops when i put it in gear almost stalling the engine


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Engine rpms drop very low when AC is on


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Want idle


Hi, I'm sorry you had a bad experience on fixya. You do not have to pay for an answer, but the experts are not employees. We are just volunteers that enjoy helping others. There are not enough of us to answer every question, so we do the best we can.
Your problem does not sound like a fuel pump problem, though it could be part of the problem. Low fuel pressure can also be caused by a failed fuel pressure regulator. Also, failure to idle could be caused by a failed idle air control valve or a clogged idle air passage. I'm willing to help you troubleshoot this problem if you can perform some testing.

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