Re: 1990 ZR1 ECM Needed
It has an intermittent misfire. It runs great and then it loses a cylinder. I replaced the ignition module first and all injectors plugs and wires. Still did it, so I pulled the ECM and had it run in another ZR1 with no problems and it duplicated the misfire after about 10 mins of running. Sure hope this is the problem.
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