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Hello, I have a similiar problem, maybe we can help eachother out. Have you found the solution to the problem?
I have checked fuel pressure and performed a fuel volume test. I disconnected all 3 catalytics and drove, same problem. When I cycle the ignition while running the engine accelerates fine 2 times, then it goes back to having a lean misfire. I sprayed Throttle body cleaner down intake hose while the engine was bogging and it accelerated up in RPM's. I cleaned the Mass Air flow sensor. The only code I have is for the EPC sensor (P1747). I checked for vacuum leaks. The problem is with all the cylinders. Remember it accelerates perfect when ignition is cycled while engine running. Please let me know if you have any suggestions. Thanks Mike