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91 5.0L Engine Stalling

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bombastis
12/13/2006 4:34:49 PM
Hey guys. My 91 5.0L keeps stalling when I slow down for a stop. The check engine light is on most of the time, but not always. It seems like it might be a vacuum problem, but I really don't know. Maybe the EGR valve? Any pointers would help me out bigtime.
04 fx4
12/16/2006 1:56:20 PM
I addition to owning several ford trucks my family and I also have several 5.0L Mustangs.  I had the same exact problem with my 89 5.0L Mustang.  On the side of the throttle body should be  a Idle Air Bypass (IAB) solenoid connected with a set of wires.  I just took it off, cleaned out the carbon with some carb cleaner, then put it back on.  Solved my problem.  However I recommend getting a new gasket.  Good luck!
Malibu Barbie
12/16/2006 4:12:08 PM
The Check Engine light is usually emissions-related, such as a sensor.  You could save yourself a lot of time and money by taking your car to AutoZone and have them check the ECU codes for free.
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