well I went and looked at an 88 with a 90 motor and tranny swap everything seems fine but its idling at 2500 RPM any idea on how to lower it the guy said he tried messing with the tps screw and all that but couldn't get it to lower oh it also has a 88 throttle body on it any ideas I don't want to get it if it could be something severe it also has a lightweight flywheel (don't know if it makes a difference)

 

***mod bump*** Sorry for the delay in the release of this thread...almost time to kick the birdy out of the nest though, at 53 posts...

Let's see what the resident 2ndgen guru's have got to say when they read this thread.

Mario III

 

but the birdie likes the nest lol bit its a weird combination of parts and car idk what it could be I only have experience with the s4