idle is to high and was stumbling on its face now its idleing two hight whats up

 

Vac line leak...IAC.. theres alot of stuff. Could yea be a little more specific.

 

ok it just started it would stumple from a stop and like try to stall out then go after i got it rolling if i floor it it go's runs fine and if its in park it sets at about 2500rpm in drive its say 15ishrpm

 

Im thinking it could be your IAC (idle air control) Either its dirty or bad.
Also look for a vaccum leak!! Spray carb cleaner all arround the vaccum lines and look to see if there all hooked up, also spray arround the intake manifold gaskets, and listen for the idle to change as your spraying the carb cleaner.

Have you reset the ecm latley, by unhooking the battery?? I see your cars a automatic so there is a relearn after you reset the ecm.

From my experience with a bad IAC sensor, my car would idle weird and then it would stall when i stoped.

And when I have a vaccum line off, the idle is high. I think its because the car is trying to compinsate for the lost vaccum at idle.

Thats just a few thoughts though, as im no mechanic

 

thats funny cuse two times i cam to a stop and the car would just shut offbut then it never did that agin

 

You know where the IAC(idle air control) sensor is on the car?? Its on the passenger side of the throttle body, mabey carfully take it out and clean it up with some cleaner. It tends to get all gunked up from the EGR passage/valve. So the spring sticks on the IAC and slams shut sometimes when its either bad or dirty. When it slams shut, is when your usually coming to a stop and it wants to stall or run weird.

 

i toke that stupid egr off years ago i cant bich thow dam good car ran the **** out of it for 5 years even with the nos kit and its just now starting to give me issues

 

ok i pulled the iac out cleand it still nothing. so i have had fiero covers for some time i put them on i did find a brake in the mid to lower intake manifold i used rtv to seal it. no one has a gasket kit around here still the same thing it idles at 2500rpm when i frist start it ,also my tach is acting like a tattletale tach idk whats going on but i need help i looked at all the vaccum lines there all ok and hooked up any more info would be nice thank you for your time

 

Check the vac on the back on the manifold and see how many inches of Hg its pulling. If you dont have sufficent vaccum then you car will give you problems. Look for 18-22 inches of vac IIRC. You could have vac leaks that you don't know you have.

 

is there a way to make it stop idealing at 2500rpm i dont like that on start up

 

Does it idle at 2500rpms even after its warmed up?? Did anyone ever mess with the ecm or the TPS controls?

 

88 corsica ecu it just started this i can take it down the road and run it kinda hard or smooth come back and its about 1700rpm

 

What engine you got in there? 2.8 or 3.1L I take it. I donno man, check the IAC and see if its dirty. And also is it spitting out any codes? Im not sure if the bin files on a Corsica are the same as on a Camaro Bin.

 

ok thanks

 

check for "pinhole" leaks in your exhaust system before the o2 sensor, that was my problem with high/bad idle

 

what about a manifold leak

 

That could definitly do it! If you can get a vac guage and check the vaccum at idle through one of the rear ports on the intake manifold. That will tell you if you have a vac leak. Do this before you start chasing your tail looking for a problem. Or did you mean exhaust manifold leak???

Ive had ex manifolds leaks before and never had idle problems, it just sounded like crap. And if you leave it leak so long it might start to burn up wires or anything elses arround the leak.

 

its not bad but i know its there most ppl dont i do thow i know my car two good its been like that for maybe 2 years it is also slugish when i give it gas dont pull had as if my tv cable when i first put my 700r4 back in but i know my tv is ok

 

any?

 

What do you mean bro, ya kindof lost me?

 

can the o2 realy do that

 

Can the o2 really do what?

 

make my car idle high

 

I guess it could but if the o2 sensor was bad it would be rich as crap all the time.

And if you had a leak before the o2 sensor it would be lean as crap, which I guess would make it idle higher but not @ 2500rpms like your dealing with.

 

well i can take it down the road run it some and cobe back park it and it idles a 1700rpm