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2000 Mitsubishi Galant Repair Question


Topics covered: Engine, Sensor, Fuel pump.
Mileage: 125,000 miles.

Asked on January 30, 2012

Fuel pump not running

Galant was shut off one evening and would not start the next day.Engine turns over at normal speed and we have spark.Fuel pump did not run.We bought a Haynes repair manual (great help with troubleshooting)followed all the steps and found that the pcm is not signalling the pump relay(which has been replaced)to turn on the pump.With a jumper in place of the relay the pump and engine run.The manual suggests that the pcm may be faulty. We're thinking there is a sensor because when the ignition switch is turned on the pump is supposed to runs for a couple seconds then shut off till the engine is started.The pressure regulator has no electrical wires,it simply opens to return excess fuel to the tank.Can you tell us if there is a sensor and where it is located?
Thanks
Larry
Avatar Asked by L Izer

Answer

Replied on January 30, 2012

The series of actions is: Key on, pump energized for 2-3 seconds. Then it shuts down. The PCM uses a signal from the crankshaft position sensor to determine when to re-initiate the fuel pump.

So yeah, it sounds like a bad PCM

Tiny Answered by rivermikerat (expert)
5,494 answers provided