Grand Cherokee forgot how to idle

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Runk - 23 Aug 2007 00:37 GMT

My wife's 98 4 litter Jeep Grand Cherokee didn't want to start. I did some
checking and it had spark & fuel pressure . I found out if I held the gas
peddle down a little it would start and run fine , but as soon as I let up
on the peddle it dies . Seems to run normal as long as you use the gas
peddle to make it idle . There's no Check Eng light . Any body have any
idea's . Thanks in advance Runk.....

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maxwedge - 23 Aug 2007 01:20 GMT

Possible bad idle speed control or gunked up throttle body.

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maxwedge

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ldimitri@peoplepc.com - 23 Aug 2007 13:03 GMT

> My wife's 98 4 litter Jeep Grand Cherokee didn't want to start. I did some
> checking and it had spark & fuel pressure . I found out if I held the gas
> peddle down a little it would start and run fine , but as soon as I let up
> on the peddle it dies . Seems to run normal as long as you use the gas
> peddle to make it idle . There's no Check Eng light . Any body have any
> idea's . Thanks in advance Runk.....

It's likely your EGR valve. If carbon hangs up the spring, then it
won't idle. I cleaned mine and it fixed the problem, although you may
have to replace yours.

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