2005 Ford Ranger rough idle

Tiny
LILB0451
  • MEMBER
  • 2005 FORD RANGER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 82,000 MILES
Plenty of fuel. Plenty of spark. Low compression. Misfire on number 4, 5, 6. Runs good cold until it warms up.
Thursday, January 21st, 2010 AT 3:53 PM

1 Reply

Tiny
TOOOMANYTOYS
  • MECHANIC
  • 513 POSTS
If all the cylinders on that bank have low compression. I would do a wet compression test. This is done by adding a small amount of oil into the cylinders with low compression. If the compression goes up then you have a piston to bore issue. If it stays the same you may have a valve sealing issue.
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Thursday, January 21st, 2010 AT 3:58 PM

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