Question about 2002 Subaru Outback

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02 outback 3.0 h6

Fuel pump runs continously with ignition on, cannot communicate with scanner. no spark, no injector pulse, security light goes of as usual when ignition is switched on. have replaced crank sensor, have had ecu & immobiliser checked out, thank you laurie

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  • roseandlauri Jul 06, 2008

    fuel pump should only run for a few seconds when ignition is on & engine off, have check throttle position switch voltages, all is good. map sensor wouldn't give no spark or injector pulse. thanks laurie.

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Try you map sensor or your throtle pos sens. your fuel pump is designed to run all the time. it is suppose to run through the fuel rail and back to the tank in a constant cycle.

Posted on Jul 04, 2008

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EA FORD


Dazzad

Im assuming this is a 3.9 ltr 6cyl?
any way there is always three things to check in regards engine not starting.

1. Compression
2. Spark
3. Fuel. "make sure you have fuel in the tank" first :)

If your vehicle is EFI

If you cannot smell fuel. Carry out these simple checks.
When the ignition is on engine off, Do you hear the fuel pump prime. This is noticeable by a short buzzing noise in the rear of the vehicle and then it will stop,

If noise is not present check the fuel pump fuse, then the relay, and last of all the fuel pump.

If the fuel pump is operational.
Make sure the fuel filter is not blocked and obstructing delivery of fuel to the injector.
If the fuel filter is ok, remove the injector plug from a injector and using a led circuit tester, or a noid lite. check for injector pulse.

If there is no injector pulse then it would possibly be a ignition module http://www.injectacarb.com.au/ford-falcon-eaed-ignition-module-p-40.html if this model of vehicle still uses a distributor

This only because I dont know if your vehicle is 3.2 ltr, 3.9 ltr single point inj, or 3.9 multi point inj,

ps: To check for injector pulse, using a LED TEST light just connect the test light in between the 2 terminals off the injector plug, and check for flickering of the led, this will say that the injector is pulsing.

A noid lite basically justs fits into the injector plug .

I hope this helps, let me know if you need more help.
Regards.


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