1996 Mercury Villager Complete Tune Done Cat Replaced Still Misfire On Cyliner

1996 MERCURY VILLAGER
163,000 MILES
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Complete tune up was done. Cat was replaced and I still have misfire on cyliner 2. Cylinder 2 injector was electricly confirmed as working. Compresion of cylinder 2 at was at 63. Cylinder 3 at 80, cyl 5 at 100. I'm tempted to replace the injector because similar rough take off was experienced in other villager with misfier on cylinder 5.
Feb 3, 2013 at 1:41 AM
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JACOBANDNICKOLAS
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The injector isn't the problem. Based on the compression in that cylinder, it sounds like you have internal engine problems. Compression between cylinders should not be more than a 20% difference. Also, 63 lbs of compression is very low. So is the 80. You may have a blown head gasket or internal damage such as worn rings, a burnt valve, or a sticking valve.

Let me know if you have other questions.
Feb 3, 2013 at 3:22 AM
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