ok i have pulled the intake manifold off an sealed it with RTV but (note this is why it idles high) once i get it runnin a spray startin fluid around it an the motor revs up but only when i spray toward the middle of the intake underneath. An i have been changin vacuum hoses left an right an it still seems to be coming from the same place. So i'm certain its the intake but Why would it be leakin from the middle like that anybody know??? An why wont it seal up

Also the hesitation issue i was havin found some bad grounds so that one thing fixed. Thank God

 

Did you check all of the vacuum hoses underneath the UIM? Those can cause hard to find vac leaks.

 

just pull the emissions and block off all the crap you dont need. is it na or t2? if its na s5 i got manifolds im selling

 

Its An N/A S4 But Its Got An S5 Intake

An All The Crap I Dont Need Has Already Been Removed
Air pump,Air switch thingy it goes to, An whatever was supposed to be where that plate under the intake is


AN YEAH THE BIG HOSE UNDER THE INTAKE HAD A CRACK IN IT BUT I ALREADY FIXED THAT

 

Ah, ok. Did you grind down the **** under the UIM? The s5 UIM has a bump that hits part of the s4 engine that you have to grind down, or it wont fully seal, causing a leak. Look for the writeup on swapping to the s5 intake.

 

it was already done when i got the car but it might be possible when i'm placin it back down i might not be getting it perfect in that spot an it might be hittin i will have to take a look at that

 

well i just went outside an tightend the intake down a little more an it made a difference of about 500rpms but i'm scared to tighten on it anymore guess i'll have to pull it off again tomorrow an set it again but i think that just might fix it

 

i finally figured it out thank you Sideways7 i woke up in the middle of the night with this conclusion since you stated that the UIM hits parts of the s4 engine! an thats it i changed the primary fuel rail cause it had a dent in it DUH HELLO yeah thats what the intake is hitting an holding it up creating my vacuum leak. its all so clear now. my god this has been drivin me nuts