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misfire cylinder

Asked Jul 27, 2012, 05:02 PM — 5 Answers
i have a 1997 dodge ram pick up. what would cause a cylinder to miss fire ? and how can i fix it. do not see and spark on or around the spark plug wire

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5 Answers
TxGreaseMonkey's Avatar
TxGreaseMonkey Posts: 15,511, Reputation: 5333
Senior Cars & Trucks Expert
  
#2

Jul 27, 2012, 05:14 PM


. Only use Champion Spark Plugs, properly gapped, on Dodge pick-up trucks. Replace them, if they haven't been changed in 3 years.

. Apply dielectric grease to the top electrode and porcelein portion of the plug.

. Replace coil, if the problem persists.

. Check engine compression and look for intake manifold leaks, in extreme cases.

. Examine wiring going to the fuel injectors. Breaks in the wiring (e.g., by mice) can affect injector performance and cause incorrect wave forms, which can throw a code.
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tomdel45's Avatar
tomdel45 Posts: 43, Reputation: 10
Junior Member
  
#3

Jul 28, 2012, 08:19 AM
will a miss fire make you fail a emission test
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TxGreaseMonkey's Avatar
TxGreaseMonkey Posts: 15,511, Reputation: 5333
Senior Cars & Trucks Expert
  
#4

Jul 28, 2012, 08:40 AM


Yes, since it causes the Check Engine Light to stay on.
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tomdel45's Avatar
tomdel45 Posts: 43, Reputation: 10
Junior Member
  
#5

Jul 28, 2012, 01:06 PM
what if i turn the engine off. will it still fail?
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TxGreaseMonkey's Avatar
TxGreaseMonkey Posts: 15,511, Reputation: 5333
Senior Cars & Trucks Expert
  
#6

Jul 28, 2012, 01:43 PM


It won't pass, until you fix the problem.
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