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240: Intermittent start problems, 1992. Should I suspect the wiring harness?

never heard of these having harness problems... you must have another problem.

You never mentioned the fuel pump relay, most likely culprit. Resolder or replace.

Next in line is the RPM sensor. Did you replace it? You can;t exactly 'check' it. Replace.

Does the '92 have the 30A ignition blade fuse behind the battery? That socket corrodes, needs replacement.

Your problem should be simple, and your car is stil lvery young... don;t get discouraged.

Maybe you can better define 'doesn;t start'. Does it fire at all? Does it fire and then stall? If it fires but does not hold idle, try unplugging the AMM (with igintion OFF) and start it, if it strts you have a bad AMM and likely a preheat thermostat to the pre-heat hose that is stuck open...


Good luck!
Greg






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