SOURCE: My 1996 Ford F150 4.9l 5spd. rough idle, poor drivability, stall
try replacing the throttle position sensor
SOURCE: 92 Ford F150 4.9L. starts good, idles rough, dies at slow speeds
4.9 litre ?? you having a laugh its a 10ton truck engine not a pick up -global warming machine,remove the pump/sender unit and check the gauze filter also look inside tank for a something floating around ,i think the idles is not a related problem to the vehicle losing power but their is a possibility you could have a problem with the little vac operated thing on the fuel injector line that allows the fuel through only when the engine is running
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