Sometimes when I start my 94 Pathfinder XE 136k, starts off rough (not everytime, but lately very frequently)with "Check Engine" light, then it smooths out and the indicator goes out. Sometimes it dont and continues to run rough. The diagnostic code is 51 that points to Injector circuit being open. I suspected a injector, but now I am having doubt about that .I have checked the continuity (12.7-13.5 ohm) and voltage across all injectors and they read good. I checked the wire and they all have continuity. I have replaced all spark plugs, wires, cap & rotor. Could it be the ECU? of could this something else. I am clueless atm. Any help will be greatly appreciated!!!
- posted
19 years ago