OK. I have been trying to solve this one myself and I'm getting no where. I have an 89 Westy with a rebuilt motor. There are nearly 15K miles on it. The right rear cylinder is miss firing at times. It generally works until the engine warms up a bit and then cuts in and out at will. I swapped the ECU with no change. I replaced the plugs and distributor cap with no change. The wires are new at 10K miles. The spark seems to be very strong. I swapped injector connectors but the problem remains with the right rear cylinder. I checked compression and it is very good. I was about to check the head cap nuts to see if they are torqued properly. I am thinking maybe there is a small coolant leak into the cylinder that "puts out the fire" but there are no clouds of steam coming out of the tail pipe. Any ideas what more I should do? Thanks much. Tom Miller |
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