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Old 08-23-2010, 04:46 PM   #1
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problems after exhaust manifold replacement

I just finished replacing the exhaust manifold on a 99 wrangler. Everything went great til i went to start it up. It revs up to very high rpms. Have to shut it off before it redlines. Everything is hooked up right, numbered all my fuel injectors to make sure they went back to the right spot. Anyone have this problem after replacing the manifold. Tks for any advice.

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Old 08-23-2010, 05:22 PM   #2
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Did you knock the throtle cable loose. Or jam the throttle body in the open position?

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Old 08-23-2010, 05:29 PM   #3
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well i did check that and the throttle body is closed and the cables seem to be all hooked up properly. in fact never unhooked any cables
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Old 08-23-2010, 05:59 PM   #4
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You didn't set the intake right on the dowels and you now have a massive air leak. Pull it off, make sure it's mounted on both the dowels,one in front one in back, and torque as instructed in the book.
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Old 08-23-2010, 06:01 PM   #5
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Quote:
Originally Posted by DevilDogDoc View Post
You didn't set the intake right on the dowels and you now have a massive air leak. Pull it off, make sure it's mounted on both the dowels,one in front one in back, and torque as instructed in the book.
X2

There are 2 "pins" that are cast into the head that the intake must sit flush on. Loosen everything up and give the intake a wiggle and I bet you it will fall and settle on them. I did this exact thing on my mother's XJ not a month ago.
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Old 08-23-2010, 08:35 PM   #6
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thank you all for the response i will check that out.
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Old 08-24-2010, 06:49 PM   #7
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thank you, that was exactly the problem, got it lined up right and ran great. never noticed that it wasnt sitting correctly. Probably never would have found it if not for this great site and the great people here. thanks again
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Old 10-26-2010, 04:44 PM   #8
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That was my problem too. Took it all loose again and reset it and started it back up and what do you know, it worked. Thanks a bunch guys.

Rick

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