Originally Posted by
Butch
My dad has installed a LS376 crate into an airboat. Everything has pretty much gone to plan with the exception of gauges and a couple DTCs. I've used my EFILive V2 to scan for RPMs, Oil Pressure, Engine Coolant Temp, and a few other PIDs. I'm able to read everything but RPMs and oil pressure through the scan tool, everything has been double checked as far as connections and hookups go. There is one sensor that has nothing hooked up to it, it is the sensor behind the starter, my father used the GMPP wiring harness and there is no provision for it, I believe it is the crankshaft position sensor.
The motor is also throwing two codes P0606 and P0335, which seem to coincide with the issues that he is having. The motor breaks down under swift acceleration, acting like its leaned out since it cant recognize rpm. Also most checksums have been disabled in the stock GM tune file.
Does this look to be an ecm issue, troublesome sensor or something I'm not thinking of?