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Old 12-30-2010
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1999 Ranger Dead Misfire 2.5

Hey guys, I'm having trouble with my 1999 Ranger. Did a recent plug and wire change and everything was fine afterward. Im now having a problem with a cylinder 2 misfire. It happens randomly and is a dead misfire, and pulls the code for it as well, and causes a flashing CEL.

The issue is that it happens randomly. Car runs great then all of a sudden will start to miss. I was thinking maybe a shorted coil pack, but I notice each wire for cylinder 2 comes off a separate coil pack. I pulled the wire off the plugs one at a time and both causes a equal change in the rpm, and both pulled cause the misfire symptom. Injector drop test causes the same condition as well. Any ideas? Plug insulators did not get cracked either
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Old 12-30-2010
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if you haven't already, change your ignition coil (you can get away with only changing the ignition side and leave the exhaust side alone) I had a similar issue when i last changed my plugs and wires and it was because of an ancient ignition coil
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Old 01-02-2011
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Figured out the problem. Checked each injector for resistance with a meter. All but 3 pulled about 14ohms, and surprise, Cylinder 2 was shorted open. Replaced the injector and all is good.
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