I just finished plumbing my intake manifold for a direct port kit and I got the manifold back on the next day. When I tried to fire it up I had two problems. At first it would start and then sputter out. That's fine, I saw alot of fuel on the manifold, so I tightened down the banjo bolt on the fuel rail and the car quit dying on me. However, now the engine revs from 3000 rpm to 4000 rpm at idle. I check the throttle cable and made it looser, so that's not a problem. My fuel pressure jumps from around 34 psi to 40 psi. What would cause this?

 

Vacuum leak. Major one, too.

 

That seems to be what everyone on PO.com is saying too. What sealant do I need to use on the intake manifold gasket?

 

Did you re-placed the Intake Manifold gasket......Sound like a vacuum leak. Get a can of carburator cleaner and spray it around the Manifold to help you find your leak...

 

I replaced the manifold gasket, but I didn't use Hondabond on it, and I was really tired/weak when I was tightening everything down. My dad is going to give me a call the next time he has to swing through town, so that I can pull the intake manifold and reinstall it properly. If that doesn't work, we'll get to try to find what else I could have messed up.

 

$2 says its your intake manifold gasket.

 

That's my guess as well.