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post #1 of 2 (permalink) Old 01-26-07, 04:23 PM Thread Starter
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97 Mustang Cold Start Problem

I have had my 6 cyl 97 Mustang for a couple years with no problems. This winter it started to have trouble when it was cold. It will start up, run for a second then die. No matter how much gas i give it (and it will rev) it just dies. Once it stays on for more thena second it runs fine. I assume it is a fuel problem, possibly fuel pump, but can't understand why it only does it when its cold out. Tried dry gas and fuel system cleaner many times, and also changed the fuel intake regulator. I have never seen anything like this and didnt know if anyone had any ideas. Thanks

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post #2 of 2 (permalink) Old 02-05-07, 12:16 AM
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Re: 97 Mustang Cold Start Problem

If your check engine light is not on, it may be that the Idle Air Control Valve (IAC) is bad. IAC's usually cause a hard start, or stalling condition. When starting the engine and at idle, the throttle plate is closed and the only air entering the engine is through the IAC. This is all controlled by the Powertrain Contol Module. It uses the IAC to allow a small amount of air to enter the engine for starting and to adjust idle speed. The IAC is mounted to the upper intake manifold with two small bolts, and has a small electrical connector on it. It is about two by four inches. It may be sticking when cold, you can remove it (be careful, it may have a paper gasket) and clean it out with an Air Intake Cleaner. If this doesn't help, it may have failed and need replacing.
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