1989 Mustang shuts off at idle Help!!! - MustangForums.com

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Old 03-11-2009, 04:15 PM   #1  
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Default 1989 Mustang shuts off at idle Help!!!

Some months ago I posted a question regarding this and recieved some very helpful advice. I am hoping for some more problem solving.
Some background: The car was running fine until one day I took the car to 40 mph in 1st gear , then 60 in 2nd gear.. Right after that the car would cut off when I would let off the gas..exiting the highway ect.

I have changed the MAS air flow, the MAP , the throttle position sensor. No difference.

I just put a new 331 engine in, and the problem still exsists.

If you need the specs on the engine I can provide them .

Any help at all that will get this car running will be greatly appreciated.

Thanks in advance

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Old 03-11-2009, 06:51 PM   #2  
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iginition switch?
fuel pressure?
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