idle issue on my 94

[Jaffman088]

hey, I am new to thread posting, but I am having problems with the idle on my 94 5.0. I'm not sure whether I am having an overdraw of power somewhere, but I have a problem with the idle getting too low, and most times with my headlights on and sometimes without them on, the power steering causes my engine to stall while idling. I'm hoping someone can help me out with this issue.

 

[94GTMustang5.0]

There is a screw you can turn to raise/lower your idle right by the throttle body. try adjusting it and see if it helps.

 

[HISSIN50]

Start with pulling codes. The CEL need not be on for codes to be stored.

If the car was running fine before, the IAC probably got gunked up and is the issue. Be prepared to replace the IAC but you can try to clean it first:

Ford Mustang IAC IAB - Solving your idle problems

Good luck.

 

[skeptiq]

Start with pulling codes. The CEL need not be on for codes to be stored.

If the car was running fine before, the IAC probably got gunked up and is the issue. Be prepared to replace the IAC but you can try to clean it first:

Ford Mustang IAC IAB - Solving your idle problems

Good luck.

Quoted for truth.

This sounds like classic IAC issues... I have had my share of idle issues and what you are describing sounds like IAC trouble. The link posted is great! There are also other articles associated with that link that will walk you through the entire idle process and how to properly set your idle. Well worth the read and the work!!!

Good luck!
Ben

 

[94GTMustang5.0]

when my IAC went bad, my usual idle of 600rpms was fluctuating between 850-1000, which was very annoying because at around 1k rpm is when my flowmasters have that annoying drone :/

 

[Jaffman088]

I was told that the power steering switch causes the vehicle to overdraw power and cuases the idle to not go up causing the engine to stall.

 

[HISSIN50]

The idle doesn't increase with PS input. Smaller engines use this feature to prevent stalling.

 

[Jaffman088]

so you're trying to tell me that it is still an issue with the IAC as everyone else is telling me? or what is your thought on the issue.

 

[HISSIN50]

so you're trying to tell me that it is still an issue with the IAC as everyone else is telling me? or what is your thought on the issue.

I mentioned in post 3 what I would do.

I was merely noting that there is no idle-speed modification for the PS on the V8's.

 

[earleys94gt]

More than likely, the sensors in the "air intake" track are dirty.

This includes the IAC, Idle Air Control, MAF, Mass Air-flow Sensor, etc.

Try and clean these sensors and see if they fix the issue, if nothing else you can eliminate these as possible sources.