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Unread 09-01-2014, 12:15 AM   #1
Trainhop91
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Head gasket/ high rpms

So I changed out a cracked 0331 head with a tupy 0331 from an 01 Cherokee. After cleaning things up I got it installed. I've now got a bad problem with high rpm. At first I forgot to tighten the bottom bolts but soon got those taken care of. While doing so I noticed the fuel line was starting to split out where it connected to the intake. I tried putting a wrap around it to keep it from leaking but it still has a pretty steady drip. Could this be causing the high rpm or is it something to do with the intake/exhaust manifolds? I made sure all bolts were tight about 4 different times and each time no luck. Seems like it's getting a lot of air!

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Unread 09-01-2014, 05:59 AM   #2
CJ7-Tim
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Quote:
Originally Posted by Trainhop91 View Post
So I changed out a cracked 0331 head with a tupy 0331 from an 01 Cherokee. After cleaning things up I got it installed. I've now got a bad problem with high rpm...... Seems like it's getting a lot of air!

Either the intake manifold is not properly seated onto the block or you have a vacuum leak. If there is a fuel leak, fix it.

Most often an improperly seated intake manifold is the cause of the high rpm. Make sure the dowel pins on the head are fully engaged into the holes on the intake.
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Unread 09-01-2014, 06:23 AM   #3
SaarXJ
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Don't run it while the fuel is leaking...
and it sounds like CJ7-Tim is right, your engine gets more air than it should and therefore more fuel, so the rpm raises...
remove the manifold and verify the gasket is not broken, then tighten it again.
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Unread 09-01-2014, 11:26 PM   #4
Trainhop91
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I only ran it after I thought a tried a few things. I'll be getting to the intake tomorrow. What's the best way of taking care of the hard line without buying a new one?
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