I’m working my way through a punch list of items while I break in these new engines. On my Stb engine, I noticed a low RPM (1,500 or so) surging of a few hundred RPM’s. If I throttled past that, it was fine and I cruised at 3,500 for a few short periods. When I tried to briefly push past 3,600 on the same engine, I could feel it being limited. I didn’t have a CEL/MIL on the gauge and didn’t really expect any codes but got 8 when I checked tonight:
these are all code 81 - historical fault:
- TAC error, no TAC reply
- 5 volt reference fault
- injector bank A voltage low
- fuel pump circuit low
- throttle actuator (TAC) fault
- ECM calibration memory error
- engine shutdown/emergency stop (assume this is what I felt at higher RPM’s.)
Does this seem like maybe a bad battery? I’ve had these random voltage codes on cars before when the battery is marginal. I’m stumped why it didn’t trip the gauge light because I would have scanned right away.
Any thoughts appreciated. Also, all of the pos/neg cables are new as part of the install so corrosion is def not an issue but I will start checking the cable ends. Finally, both engines start fine and my running voltage is ok at 13+. They do automatically bridge when starting so a bad battery could be masked by the good one.
thanks
Bob
these are all code 81 - historical fault:
- TAC error, no TAC reply
- 5 volt reference fault
- injector bank A voltage low
- fuel pump circuit low
- throttle actuator (TAC) fault
- ECM calibration memory error
- engine shutdown/emergency stop (assume this is what I felt at higher RPM’s.)
Does this seem like maybe a bad battery? I’ve had these random voltage codes on cars before when the battery is marginal. I’m stumped why it didn’t trip the gauge light because I would have scanned right away.
Any thoughts appreciated. Also, all of the pos/neg cables are new as part of the install so corrosion is def not an issue but I will start checking the cable ends. Finally, both engines start fine and my running voltage is ok at 13+. They do automatically bridge when starting so a bad battery could be masked by the good one.
thanks
Bob
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