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.

5.0L won't idle on its own.

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Old 07-04-2010, 05:48 PM
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jcloutier
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Default 5.0L won't idle on its own.

Having a brain dump... My 5.0L won't idle and is somewhat hard starting. To preface the situation, I had to replace the 2nd water pump and timing cover and prior to the disassembly the engine purred (210K) worth. During the teardown I had to use mapp gas to remove some stubborn bolts. I did not remove the timing chain or touch the distributor. Although the TFI was in the general area, it did not get direct heat. I wonder if I fried the TFI just because it was in the general area ( 6- 8 inches above the action). It will start and run if smooth if I hold the pedal halfway down but only @ 700-800 RPM but then does not respond to further throttle advance. Anything obvious that I may be overlooking? I'm going to check the timing just in case but any suggestions would be appreciated. Part of me wonders if I fried a wire down under but I amd still looking to see and never saw or smelled any plastic burning. Thanks in advance.
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Old 07-04-2010, 07:49 PM
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93hatch306
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pulled any codes yet? offhand, it sounds like the IAC motor or TPS...but that's just a guess.
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Old 07-04-2010, 08:03 PM
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Bubba 95SN
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Got em too crispy.
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Old 07-06-2010, 08:49 PM
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jcloutier
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Found in my angst that I must have hit the distributor pretty hard (probably when I broke the 6 of the 7 water pump bolts) But safe to say it's been retimed to 13* and is running sweet for 210K... Thanks for the humor!
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Old 07-06-2010, 08:59 PM
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93hatch306
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cool.....crispy electronics SUCK.
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