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Misfire on decelaration

2K views 1 reply 2 participants last post by  360ci 
#1 ·
I have a 1999 Ford Ranger 4 Cylinder. I have a misfire in the #2 cylinder. Spark plugs good, cables good, coil pack good, injector good, good compression, no leak down in the cylinder. Slight engine noise though when the engine starts to misfire. Any Ideas?
 
#2 ·
Have you been going through any fluids? More so coolant or engine oil?

Take that particular spark plug out and swap it with another. Just to rule out a bad O ring on a fuel injector, swap it with another cylinder as well. If the misfire follows that injector you will have found the problem. Make sure that the plugs are gapped correctly. I know a lot of folks who buy them at the auto parts store and install them right out of the box and they have misfire and drive-ability problems.
 
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