86mustangGT

Ok i just installed a Typhoon Upper and lower intake on my 86 Gt. Now ever since the install it runs kinda ruff. It doesnt seem to wanna idle smooth it really raspy and crackles. And sometimes while driving you can feel this slight lundging like its slightly missing or somthing. Now ive been over all the vaccum lines n such and im just lost the car is in time and everything else looks good any ideas what could cause this?

stanglx2002

readjust your tps and timing

mdvaldosta

Yea, check your TPS voltage, check timing, and make sure you don't have any vacuum leaks. Also, even with all that correct if you've still got the speed density system you may not be able to work it out w/out converting to mass air. Most intake mods are ok on those cars but nothings for certain.

86HOGT

True ^

stanglx2002

make sure you dont have any leaks between the upper and lower intake and the heads and the lower intake

mustang8719

I had a leak at my lower intake when I installed mine and it acted the same way.
Once I replaced the gaskets all was fine.

silver91gt

same here
its probably the lower intake gasket.

did you go over all the bolts a bunch of times in the right order untill they are all tight.

I know when I did my first intake I torqued the bolts once and it leaked bad.
had the same symptoms you describe, but worse.

86gt5.0HO

The surging you describe makes me think it's runing lean, which is proly due to a vac leak.

86mustangGT

probably im goign to one of my buddys shope at the end of the week and were going to do a smoke machine on it to see if we can see any vaccum leaks in the system then ill update what it was