Wont stay running at stops, and dies while moving | Ford Explorer Forums - Serious Explorations

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Wont stay running at stops, and dies while moving

Chnco7088

New Member
Joined
February 21, 2016
Messages
2
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City, State
Odessa, Texas
Year, Model & Trim Level
2001 Ford Explorer Sport
2001 Sport/4.0L
The car does run, but it does so very rough and it dies sometimes. The vehicle idles at 500 rpm and after repairs it has not died at idle in park. There is no check engine light the only one that used to be on was a double lean code solved by the intake manifold gasket was replaced. The car can get to speed and coast at highways speeds but it will die when you vehicle slows down to a stop for example when coming to a stop light. When it dies it has a very hard time starting and will go to high rpms then fall all the down and die. It sometimes will idle after you restart it but as soon as you put it in drive it dies. We have replaced the egr valve,egr sensor, spark plugs and wires, intake manifold gasket upper and lower, and ignition coil
 



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Dirty or bad maf sensor could cause the low rpm and stalling.
 






Have checked or replaced the IAC valve. Idle air control valve. Did you plug it back in after you replaced all the intake gaskets.
 






^ Ditto IAC. Also check the notoriously failing PCV elbow. Neither will always throw a CEL or DTC's. Use throttle body cleaner on the IAC. Also good advice CAREFULLY spray cleaning the MAF sensor filaments. Use no residue electrical contact cleaner. Troubleshoot one part at a time to pinpoint your idle issue. Also helps to be more SPECIFIC with your post title. "Can't figure it out" or "Broken" doesn't help getting responses. Keep us updated and good luck.

http://www.mysporttrac.com/mysporttrac/projects/CleaningIAC/CLEANING_IAC_MOTOR.htm
http://www.mysporttrac.com/MySportTrac/projects/ThrottleBodyCleaning/Throttle_Cleaning.htm

P0171 & P0174 4.0L SOHC's Sport/Sport Trac | Ford Explorer and Ford Rang
job 1 or job 2 | Ford Explorer and Ford Ranger Forums - Serious Explorations

 






Thank you for the tips. Forgot to mention that the pcv valve, etc. had already been changed, and MAF sensor has been cleaned already as well.
Changed the IAC last night, and so far, so good. Hopefully that fixes it. Thank you again for the tips.
 






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