5.4 bad stutter, engine stalling when the motor gets up to temperature

Tiny
RUI9671
  • 1999 FORD F-150
  • 192,000 MILES

Truck has 192000 miles on it, had a new motor put in with approx 125000 miles on it. About 400 miles later it now stalls when under acceleration, almost feels like a cylinder isn't firing. Runs perfect when the motor is cold, idle's fine regardless of temp. No error codes from the computer. Have replaced fuel filter, air filter, and just did my spark plugs and no change.

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Friday, February 17th, 2012 AT 4:42 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
  • 68,399 POSTS

Is the fuel pressure within spec?

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Friday, February 17th, 2012 AT 4:43 AM
Tiny
RUI9671
  • MEMBER

Have not checked that, will check tomorrow after work

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Friday, February 17th, 2012 AT 4:51 AM
Tiny
JACOBANDNICKOLAS
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  • 68,399 POSTS

It may be weak.

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Friday, February 17th, 2012 AT 5:04 AM

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