Truck missing at low rpm's

1999 FORD F-250
200,000 MILES • 5.4L • V8 • 4WD
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TERRY HOCKMAN
  • MEMBER
  • 1 POST
Truck misses at low rpm but if you speed it up a lot the engine runs find. what is wrong?
May 5, 2019 at 1:18 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Hello,

It sounds like you have a vacuum leak but to be sure please go over these two guides.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please run down these guides and report back.

May 6, 2019 at 4:16 PM
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