Question about 1990 Ford F150
Truck starts , idle rough, starts again runs fine. some days it dies while running. have changed map sensor,oxygen sensor,relays,fuel pump,etc.
I had the same problem with My 1990 F150 300 6cylinder 4x4.....I cahnged all the same things you did, finally I sprayed a can of Gumout through the throttle body and it worked and ran great. Now I add fuel injector cleaner to the gas and a regular clean with the gumout and the problem has'nt come back. Good Luck to you and hope it works!
Posted on Oct 06, 2008
I've had as similar problem with my '90 f150 5.0l, i would clean out the IAV(idle air valve) on the side of the throtlebody with some carb cleaner. If that doesn't work you might have to repalce the whole IAV assembly.
Posted on Oct 27, 2008
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Posted on Jan 02, 2017
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