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JeeperRob 06-17-2010 02:52 PM

High Idle
I just replaced my exhaust manifold on my 89 with 2.5L engine because it was cracked. In order to do this I had to remove my intake manifold and Throttle body. After putting everything back together I started the Jeep and am having a high idle (3000 RPMs). Any Idea what I could have do to cause this?

flatline 06-17-2010 03:06 PM

vacuum leak?

JeeperRob 06-17-2010 03:10 PM

Yea my thoughts too. Are there any lines specifically to check that would cause this high idle?

Got_Mud? 06-17-2010 03:26 PM

I don't know if his Jeep has one, but my old truck has a monster vacuum line to the master brake cylinder and it comes from the manifold - when it got cracked it caused a horribly high idle... and it's a big hose, too.....

JeeperRob 06-17-2010 03:52 PM

1 Attachment(s)
I looked around a found a nipple off the intake that didnt have a hose on it but couldn't find a lose hose any where. I took a picture of it. Does anyone know where the hose that hooks up to this nipple goes?

JeeperRob 06-18-2010 12:21 AM

Can some one with an early model YJ that has the 4cyl AMC 150 take a look and see what vacuum hose goes to that nipple?

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