In need of HELP

[89slowster]

My stang is acting funny as hell. When the car has warmed up and I have it in gear at a stop light with the clutch in, the idle starts to jump from 600 rpm's to about 1300 rpms. I have changed the throttle position sensor and the idle air control. Along with cleaning and then changing the maf sensor. What else am I missing that could cause this problem?

 

[BlownFiveLiter]

My stang is acting funny as hell. When the car has warmed up and I have it in gear at a stop light with the clutch in, the idle starts to jump from 600 rpm's to about 1300 rpms. I have changed the throttle position sensor and the idle air control. Along with cleaning and then changing the maf sensor. What else am I missing that could cause this problem?

Quite a bit, actually. Before you throw more parts at it, go over this: http://forums.stangnet.com/698148-help-me-create-surging-idle-checklist.html

 

[89slowster]

Hopefully that works. That or I am just going to strip the car completely and start all over. Putting the car the way it should be. Rice eating, Chevy *****ting machine

 

[BigDanTheMan]

what kept causing me to surge and ultimately stall out was bad plumbing on the intake. my C&L intake pipe didn't agree with my Morosso fender wall kit, and kept separating. maybe part of your intake piping is letting in some unaccounted for o2.

 

[89slowster]

Already looked into that. But I don't have a cold air intake. My car is 100% stock. I have been trying to work out all the kinks it has before I start doing any mods.