LaserRed01GT
Banned
Back to reevesracing, did you get a chance to check the fuel pressure and look at the fuel system wiring?
Another thing I was thinking about was, sometimes the fuel pump driver module can have a short or open circuit and not throw a code. This can drain the battery and keep the pump from correctly operating. I would start back probing from the pump harness by the tank and go forward. Also check all connectors along the way for a loose connection or moisture in the connector.
The Fuel Pump Monitor (FPM) circuit is spliced into the Fuel Pump Power (FP PWR) circuit and is used by the PCM for diagnostic purposes. The PCM continously draws a low current voltage down the FPM circuit. With the fuel pump off, this voltage is pulled low by the path to ground through the fuel pump. With the fuel pump off and the FPM circuit low, the PCM can verify that the FPM circuit and the FP PWR circuit are complete from the FPM splice through the fuel pump to ground. This also confirms that the FP PWR or FPM circuits are not shorted to power.
Another thing I was thinking about was, sometimes the fuel pump driver module can have a short or open circuit and not throw a code. This can drain the battery and keep the pump from correctly operating. I would start back probing from the pump harness by the tank and go forward. Also check all connectors along the way for a loose connection or moisture in the connector.
The Fuel Pump Monitor (FPM) circuit is spliced into the Fuel Pump Power (FP PWR) circuit and is used by the PCM for diagnostic purposes. The PCM continously draws a low current voltage down the FPM circuit. With the fuel pump off, this voltage is pulled low by the path to ground through the fuel pump. With the fuel pump off and the FPM circuit low, the PCM can verify that the FPM circuit and the FP PWR circuit are complete from the FPM splice through the fuel pump to ground. This also confirms that the FP PWR or FPM circuits are not shorted to power.