03GTStangMD

Hey guys i just put in a 70mm MAC TB, the car runs fine but when your driving and u drop the car into nuetral the rpms stay at 1500, until u stop and then the idle drops to about 800. And when you rev the car the rpms coast down really slow, then pause at about 2000, then drop back down to 800. I adjusted the idle screw so i dont know what the problem is

mustnglvr

are there any codes

03GTStangMD

no codes what so ever, whats funny is I unplugged the idle air bypass plug, and the rpms are fine. but that will trigger CEL

mustnglvr

I would say plug the bypass plug back in and reset the computer. If that doesnt fix it let us know

03GTStangMD

Tryed it, nothing stil idles weird, ill try to get a video in of what it dose, it premuch idles at 1500 while coasting in nuetral, then once you stop gose back down. I mean i cleaned the manifold when everythin was apart with tb cleaner, idn if that would affect it

mustnglvr

Yea see if you can get a video that would help. You might try putting the screw back to where it was when you got it and reseting the pcm

rvoss5

did u let the car idle to operating temperature before you drove it around? it has to relearn the idle. if u didnt', simply take the negative off for a few minutes and put it back on and let it idle to operating templ.

03GTStangMD

here is the video of the idle, as you see i am crusing in first gear then when you see the rpms coasting down that means i put the car in nuetral, you can see how it gets stuck at 1500 and then when i make a complete stop, the rpms fall, your going to need quicktime to play the video, i used my phone to record it, here is the link its 1.5mb http://www.sharebigfile.com/file/274...6-002.3g2.html

03GTStangMD

bump ? any ideas?

03GTStangMD

bump