today i removed my intake elbow to replace the spark plugs. all was going well untill i hooked everything back up and started the car, it started right up but was idling like a piston engine was camming i guess, going up and down real fast. it was spitting out a LOT of smoke and didnt stop. i heard air spraying out from under the UIM so im guess thats a vacuum leak. i have a 2 questions about this. 1. could a vacuum leak cause a whole lot of smoke to come out like it was doing? 2. if i were to remove the UIM to check for the leak, would i have to replace the gasket going from the LIM to the UIM?

 

a vacuum leak can make the car run like crap and smoke (most commen is the line to the map sensor unplugged will do this)

Ive reused my lim-uim gasket plenty of times

 

i agree you must have knocked the vacume line off the map sensor...

 

alright thanks guys ill check on that tomorrow

 

Also, did you make sure the TB to Compression Tube (elbow) O-Ring seated in it's groove??. If not, that may be an avenue for a vacuum/boost leak as well.

 

i just walked out to my car and the vacuum hose was not connected into the map sensor, i hooked it back up and it was back to normal(even though normal is idle at 1500 rpms) with a few minutes of smoke after startup.(always does this) i think i have a different vacuum leak somewhere else because of the high idle, thanks for the help
Craig