Question about 2001 Ford F250 Super Duty Super Cab
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Posted on Jan 02, 2017
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
SOURCE: idles rough
Check for engine vacuum leaks, most likely around the upper intake manifold arear, look for vacuum hoses that have come off or a missing vacuum port block off cap at the rear of the engine drivers side, large cap.
Posted on Nov 04, 2008
SOURCE: truck runs rough
Sounds like one of your chambers isn't firing. Run your car for a few minutes, shut it off then pull your plugs one at a time and see if one of them is wet. Might just need a new plug.
Posted on Nov 28, 2008
SOURCE: 1988 ford f150 running rough
Might want to change o2 sensor's, If they are not sending the right single its tell the computer to dump fuel. 1988 was using a fuel density system.
(1989 came out with Mass air flow system)
I think it might have a TFI module that's not working right. Located under distributor. Its gray and about 4" long and if equip, you need a 4 or 5.5 mm tool to unbolt it. This was a common thing back in the 80's. Its been so long I can't remember if the 4.9 straight 6 had it or not.
I- Ignition module
Posted on Apr 24, 2009
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