5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

rough idle/ kills only when cold

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Old 10-10-2008, 04:01 PM
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A.V.O.'s Dad
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Default rough idle/ kills only when cold

Fires right up when cold. Idles fine for about 10-15 seconds then a little rough and dies. Fires right back up and repeats. Once it is at operating temperature, no problems. O2 sensor?
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Old 10-10-2008, 06:53 PM
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U S Marine
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O2 are not operational at lower temps, so I would rule those out. IAC, IAT or ECT I would look at if your still an SD car.
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Old 10-12-2008, 04:00 PM
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A.V.O.'s Dad
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Originally Posted by U S Marine
O2 are not operational at lower temps, so I would rule those out. IAC, IAT or ECT I would look at if your still an SD car.
Thanx. I'll check it out this week. Been busy lately.
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