2005 Ford Ranger rough idle

2005 FORD RANGER
82,000 MILES • 6 CYL • 2WD • AUTOMATIC
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LILB0451
  • MEMBER
  • 1 POST
plenty of fuel. plenty of spark. low compression. misfire on number 4,5,6. runs good cold until it warms up.
Jan 21, 2010 at 3:53 PM
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TOOOMANYTOYS
  • CAR REPAIR CONTRIBUTOR
  • 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.
Jan 21, 2010 at 3:58 PM
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