Question about 2001 Ford F250 Super Duty Super Cab

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I have a 2002 F 250 with the 7.3 in it. It is all stock nothing has been done to it. In the mornings only the truck will just fall flat on its face . no throttle response. It runs rough at an idle. It does not die . After about 10 seconds I can give it throttle and it seems to clear itself out

Posted by Tom Wolcott on


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  • 1 Answer

SOURCE: truck starts, dies. truck runs good some days,bad the next

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



  • 85239 Answers

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



  • 21 Answers

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


  • 16 Answers

SOURCE: Idles rough when cold

the throttle body is icing. there are engine coolent lines running to the intake plentum. flush youre cooling system and see if that fixes it

Posted on Dec 30, 2008


johnny wyatt

  • 453 Answers

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)
Check this
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.
T- Thick
F- Film
I- Ignition module

Posted on Apr 24, 2009

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