Im thinking this has to be a vac leak, but Ive replaced every gasket on the intake. I have IAC control but while this is happening, the IAC isnt moving at all, sitting at where it would normally idle but not engaging because RPMs are changing too fast. Map is going from 40-80 kPa. Normally sits at 55 at idle.

YouTube.com

Cannot tell what is going on in TunerStudios without any focus there.

How flat is your ignition advance table in your idle area?

Also, have you done a boost leak test to verify you have no leaks in the intake tract?

Yeah I dont know why my camera wouldnt autofocus on it. Top left is RPM, lower left MAP, Top right AFR, lower right TPS.

This is my spark table, used to have a perfect idle with it so I dont know why it would change now.



Havent done a boost leak or vac test (still NA), wasnt really sure how to go about one.

If the advance table has remained the same, then there should be no issue there.

A BLT does not matter if you are N/A or boosted. Just make a coupler so you can use positive pressure from a compressor to pressurize your intake tract to find leaks.

Easier to test for leaks while the engine is off instead of trying to listen for hissing noises while running.

Everyone thinks a BLt can only be done if you are boosted, for some reason.

Probably the boost part of boost leak tester. Thats what got me anyways. Ill have to try that today though. I assume you hold the throttle open while you pressurize the intake?

Yep.