i just installed the greddy fmic and the car starts and dies right away
there were a couple of other posts about this kind of thing but none with any real solutions i asm pretty sure its a vacume leak but from where? please help this is my daily driver and i need it on the road its an 89 turbo 2

 

If all you did was change out the intercooler, then it sounds like you're letting air in somewhere after the MAF. I would start by checking for leaks, or clamps that aren't tightened down. The computer regulates fuel based off the amount of air it sees going through the MAF, so if air is coming in after the MAF, there won't be enough fuel to start it.

I have no intercooler experience, but it just stands to reason. Hope it helps!

 

ya thanx for your help i found the leak and it idle like a dream now

 

No problem - I have a Capri that just died going down the road one day and I stared at the engine for like 20 minutes before I realized that the hose going into the throttle body had come loose and was letting air in.