Sensor or The Fuel Pump??
#16
If you are 100% sure the fuel pump is not turning on for 1 second when you switch the key to the ON position then test the fuel pump relay located in the IPDM.
Key ON - If the ECU can see a signal from the CRANK position sensor then the ECU sends signal to IPDM to close the fuel pump relay for 1 second.
Key START - If the ECU can see a signal from the CRANK position sensor then the ECU sends a signal to the IPDM to close the fuel pump relay, ECU also sends signal to the ignition start relay to crank the motor, ECU monitors for data being transmitted back from the CAM position sensors, it uses this data to fire the spark plugs and open injectors at the correct timing.
If there is no signal from the CAM position sensors then you will receive no injector pulses and no spark. If there is no signal from the CRANK position sensor then you will receive no fuel injector signal, no spark, and NO POWER TO CLOSE THE FUEL PUMP RELAY.
You can test the fuel pump relay for proper operation easily by bench testing it, you can also unplug the fuel pump harness and check for voltage on the brown/yellow stripe wire at the fuel pump.
My rule of thumb for a quick test of the fuel pump is just squeeze the rubber fuel hose in the engine bay between the damper and the feed line, you can feel it sort of "vibrate" if there's fuel pressure.
Key ON - If the ECU can see a signal from the CRANK position sensor then the ECU sends signal to IPDM to close the fuel pump relay for 1 second.
Key START - If the ECU can see a signal from the CRANK position sensor then the ECU sends a signal to the IPDM to close the fuel pump relay, ECU also sends signal to the ignition start relay to crank the motor, ECU monitors for data being transmitted back from the CAM position sensors, it uses this data to fire the spark plugs and open injectors at the correct timing.
If there is no signal from the CAM position sensors then you will receive no injector pulses and no spark. If there is no signal from the CRANK position sensor then you will receive no fuel injector signal, no spark, and NO POWER TO CLOSE THE FUEL PUMP RELAY.
You can test the fuel pump relay for proper operation easily by bench testing it, you can also unplug the fuel pump harness and check for voltage on the brown/yellow stripe wire at the fuel pump.
My rule of thumb for a quick test of the fuel pump is just squeeze the rubber fuel hose in the engine bay between the damper and the feed line, you can feel it sort of "vibrate" if there's fuel pressure.
IT WAS THE IGN & ECCS FUSE.
Now I need you guys help on why it blew in the first place??????🤔
FOR FUTURE REFERENCES:
Last edited by AnonG35; 06-30-2018 at 10:12 PM.
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