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Engine misfire

Tiny
MKEELEY
  • MEMBER
  • 2007 FORD EXPLORER
  • 72,000 MILES
Recently, only on highway, truck "bucking" sensation. Mostly on acceleration. Took to mechanic, no code came up, no engine light on. Any ideas
?
Sunday, January 27th, 2013 AT 6:22 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Have you checked fuel pump pressure? This guide is great for finding misfires

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

Please run down this guide and report back.
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Sunday, January 27th, 2013 AT 6:23 PM
Tiny
MKEELEY
  • MEMBER
  • 4 POSTS
Actually, I am a woman that doesnt know one thing about cars. BUT. This has been my truck for almost 6 years. I know when its now running correctlyl At low speeds, fine. Getting on highway, or changing speeds on highway truck hesiates, jerks, bucks. I dont know if mechanic tried the fuel pump pressure. If there was an issue with the fuel pump, would a code come up? No engine light, or code came up when he plugged into computer.
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Sunday, January 27th, 2013 AT 6:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
The fuel pump itself won't set a code. If it causes it to misfire for an extended period of time, the misfire will set a code. See if he checked fuel pressure.
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-1
Sunday, January 27th, 2013 AT 6:31 PM
Tiny
MKEELEY
  • MEMBER
  • 4 POSTS
OH. Ok great. That makes total sense! If fuel pressure is the issue, that that indicated a bad fuel pump? Or a more serious issue.
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Sunday, January 27th, 2013 AT 6:38 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Usually it is either a plugged fuel filter or the pump itself
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Sunday, January 27th, 2013 AT 6:39 PM
Tiny
MKEELEY
  • MEMBER
  • 4 POSTS
THANK YOU THANK YOU. I will have him check that. Have a good day.
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Sunday, January 27th, 2013 AT 6:41 PM

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