No Idle

[s.h.o.p.r.i.d.e]

I have been having some frusterating idle problems on my 94 ATX Ive reset it many times, but when I start it in the mornings it starts fine reves up to 2 grand, for a second or too then just dies unless i keep it going, once it warms up it doesnt really do it..Any ideas? thanks

 

[blue thunder]

You can set the idle for whatever rpm you want. I had a lot of work done to mine including underdrive pulleys. I changed the idle to 1000 rpm so everything has enough juice. mpg sucks thats the downside.

 

[s.h.o.p.r.i.d.e]

do you just adjust it with the screw your not supposed to adjust?
I think someone messed with that, because it idles at about 5 hundred
when its warm. isnt factory like 850 or somthing?

 

[SASHO91]

might want to check/change you Air idle bypass valve.... check your air filter....

and check the screw... if it hasnt been touched it should have a mark on it were it was set at.... IIRC...

if the AIBV is dirty, then you could try to clean it out... first..... then if that dont work.. then go get another....
thats what this sounds like to me....

EDIT: there is a proper way to set your idle.... it envolves turning on certain accesories in order... allthough i cant remeber off head what it is.... might want to check out Josh's site, shopheonixproject..... or something like that... and Shotimes......

 

[NotSoSlowSHO]

Idle Speed Program Reset Procedure
-----------------------------------------

1) Disconnect the negative battery terminal.
2) Turn on the headlight switch.
3) Wait at least 10 minutes.
4) Turn off headlight switch.
5) Reconnect the negative battery terminal.
6) Start engine normally (never press the gas pedal).
7) Allow the idle speed to settle for at least 30 seconds.
8) Within 70 seconds of starting the engine, concurrently apply all accessory loads.

a) Climate control to MAX A/C.
b)Headlight switch ON, brights ON.
c) Turn steering wheel slowly ~1/4 turn side to side.
d) Press brake pedal.
e) ATX SHOs only: shifter to DRIVE.

9) Do not turn off engine for at least 5 minutes.

 

[AutoSHO]

If your ATX is revving up to 2 grand, its probably got a vacuum leak. Even the MTX really shouldn't rev that high.

 

[SASHO91]

yeah check the vacum hoses on the intake first.. the one on the top of the T/B .... and the ones that are easily accesable... (sp)
forgot about that Chris... i was thinking more mechanical..... but hey anything is possible... it is a sho....

 

[89 black SHO mtx]

If it was the IAC then it wouldn't start at all. Definatly a vacum leak. will the car run if you keep your foot on the gas? As I understand the problem when you start the car it jumps to 2k then imediatly dies. Rn time=2 seconds or less.

 

[s.h.o.p.r.i.d.e]

yeah, exactly if i warm it up for a minute it will idle at about 5 hundred, when i put it in reverse and give it gas then let aff it just dropes to about 200 and dies sometimes, ive checked my vacuum hoses a bunch and there all air tight?>

If it was the IAC then it wouldn't start at all. Definatly a vacum leak. will the car run if you keep your foot on the gas? As I understand the problem when you start the car it jumps to 2k then imediatly dies. Rn time=2 seconds or less.

 

[89 black SHO mtx]

have you checked for any engine codes? That still may be a stuck IAC unless it will idle up on its own at startup. If it idles at 500 all the time it may be stuck in one position. what do you mean "if aI warm it up"? is that with yourt foot on the gas? Its hard to trouble shoot from a desk so the more info the better. Its better to over write then to under write. Ken