I just installed my new header and cleaned out my ports. But after reinstalling my intake manifold the car can not hold idle. When i turn the key the car revs to like 6-7. But if i cluth in and put it in gear the car will die out. I assume its a vac leak but was just wondering if there was any other possibilitys before i have to strip down the intake again to check all the lines.

 

No other possibilities that I can come up with..

 

Intake Manifold:
- make sure your MAF (mass airflow sensor) is connected
- make sure the plastic piping is tight
- make sure you reconnected the two smaller tubes connected to the primary plastic intake piping behind the MAF

Headers:
- make sure you hooked up the O2 sensor
- make sure you hooked up the grounding strap between the body & back of the header

 

This morning i went out and tried to start the car again. Now it doesnt rev to 6k anymore but it still dies when off the throttle. So i restarted and kept the car at 2k rpm so it doesnt stall out. But when i did this the car started vibrating quite bad. Could this possibly be a bad rotor even though it was fine before i installed the headers???