Question about 1991 Ford F150

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Haven't been a big fan of Ford lately....The vehicle in question is a 1991 ford F-150,4.9 liter. It will start and run excellent for up to 10 minutes....then dies and will not restart until it sits for several hours,then it repeats the process. I've changed both relays...it has new plugs and wires,new distributor(that I'm starting to suspect is bad) new fuel pump...clean filter...and a new EEC computer. my distributor module was new also,but i have noticed burn pits on it. I can't seem to find a short in the harness...the truck is on my last nerve and ready for the scrap yard to increase my satisfaction,lol Any help would be appreciated. Thanks, Shane in SC

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Well i really would investgate the burn marks more but if it only starts dead cold then i would be thinking what changes when it gets warm and stops it from starting and running after warm. seeing you replaced all of that stuff doesn't rule them out and a dist. maybe not the issue but a module may. it also may have something to do with the temp sensor. it could be broke and telling the eec unit to rich the fuel up like a choke and not leaning it out when it gets warm because the sensor is still telling it is cold. just a few quick thoughts.

let me know any more info that could help.

Posted on Dec 12, 2009

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