Rough idle

Tiny
SPIKE7
  • MEMBER
  • 1992 FORD MUSTANG
  • 2.3L
  • 4 CYL
  • RWD
  • AUTOMATIC
  • 113,000 MILES
A few weeks ago, it started idling rough when you first start it and it cuts out when you first take off. I have put new spark plugs, new spark plug wires, new mass flow intake and a new fuel filter on it in the last six months. But once you get going, it runs like a new car. I was wonder would the fuel pump be getting weak, or would the fuel filter be plug. Any help would be greatly appreciated.
Tuesday, July 4th, 2017 AT 8:41 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge it will cause all kinds of problems. Auto parts rent gauge. See link on how to do it.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Tuesday, July 4th, 2017 AT 10:21 AM
Tiny
SPIKE7
  • MEMBER
  • 2 POSTS
Thank you.
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Tuesday, July 4th, 2017 AT 12:42 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Hello,

I would start with a compression test see if you have a weak cylinder, if you don't have a gauge you can rent one for free at the auto parts store.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken
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Wednesday, July 5th, 2017 AT 5:16 PM

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