So I'm looking to sell my Z soon so I started putting it back to stock today. Took off my Motordyne 5/16 spacer, screwed everything back together, disconnected the battery for 15 minutes, connected it and I have a very rough idle? I figured it's just got to learn the air flow or whatever again. Am I right? I checked numerous times for vacuum leaks or anything and everything is in place.

My car has full bolt ons (minus the motordyne spacer now) and uprev tune.

 

vacuum leak. When in doubt take it all apart and put it back together again, for some strange reason sometimes it works perfectly the second time

 

i've checked for vacuum leaks at least 10 times. everything is snug and in place.

 

you need to do the throttle body position relearn procedure followed by resetting the ecu.

 

u shouldnt have to do anything with the throttle reset or idle relearn or anything because you didnt mess with that but its worth a try i guess...id still say theres a vacuum leak somewhere

 

reset the computer

 

it drove normal on the ride home, and idle got a little better. im hoping it will be normal when i go to start my car in a few hours.

 

MAF sensor put back on backward??

 

Make sure your gasket isn't pinched.

 

vacuum leak for sure as others have stated.. take maf cleaner and spray around edges of gasket when cars running.. ANY as in even slight increase in rpm is your vacuum leak .