krsdownlow

Hello All,

I need your expertise on an issue I am having with my 99 Mustang GT. When I start the engine, the car idles at only 500 rpm and then turns off. I have to step on the gas and keep the car rev'd on 1000+ rpm to keep the engine on. Basically it seems like the engine isn't getting enough gas to stay on. After 10 minutes of stepping on the gas to keep the engine on, the car goes back to normal and will stay on with out me stepping on the gas. This has been happening for a week. Any ideas? Thanks.

-Chrys

dstangrunner

Check your IAC. It might be going out or dirty. My car was doing the same thing and it was that.

JimboGT01

IAC....?? stupid question?

DaMach04

my friend's 240 used to do soething similar, if his rpms dropped too fast (him putting the car in neutral) or if he didnt give it gas when he cranked it, the car would stall.

He had to give it gas at startup, and then had to down shift to slow down, he could never put it in neutral while slowing...


it was his Idle Positioning Sensor (or something like that).

DaMach04

Idle Air ?(control)?

dstangrunner

The air sensor. I went out on mine. Replaced it and it idled fine and drove fine after that

Colorado_Mustang

Idle Air Control, as someone mentioned. Wouldn't be a bad idea to see how well your coolant temp sensor and air intake sensors are reading as well (good scanner and temp probe).

hurleymasta

if its not that i suggest the EGR, sometimes they get sticky, it happeend to my firebird, i had to rev it til it was warmed up, take it off and spray it with some carb cleaner....
Ryan