I need the names of the people who have successfully completed the S3 GSLSE intake to the S4 intake manifold conversion. I'm done with my engine swap and mine wont idle. Revs up and down. Its not a TPS adjustment. If it was it would smooth out after throttle is applied. This is not the case. PLEASE HELP!

 

Try pulling vaccume lines off solenoids if it stops fluctuating then the selonoid you removed the vaccume line from if bad. I had this problem with my SE and it turned out to be by BAC valve. Took me 4 days to figure it out what a pain I ended up capping the BAc valve off so ir doesnt work at all. My symtoms were what you stated revs up and down and wont idle no matter what I checked everything 10 times over and I mean everything with Fluke and without fluke multimeter.

 

I'll check. Still need names....bump^