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Tina Hickman Posted on Sep 12, 2015
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03 subaru Legacy 2.5 won't start . Turns over but won't fire. I have replaced fuel pump , fuel filter , and the pressure regulator. Pure fuel in the intake and starts fine What could be the problem

1 Answer

dlampman

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  • Subaru Expert 111 Answers
  • Posted on Oct 14, 2015
dlampman
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Joined: Mar 25, 2011
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Does it start and keep running? Or does it start and just run for a few seconds? If it starts and runs for a few seconds you need to check your fuses first. It could be the fuel pump or EFI fuse or a few others.
If you prime it and it keeps running, well, you've got me there.

5 Related Answers

ROBERT

  • 67 Answers
  • Posted on Nov 25, 2008

SOURCE: hard start

Its your fuel pump.I had the same plomblem not too long ago.I was spraying either in to start it.I have a 97 chevy truck witch requires 65 psi to start and 55 to run properly.You need to find out much psi you need to start it.You can probaly look in your manual or just make a few calls.My truck had 55 psi and it ran fine i just had to get it running first.Good luck.I wonder if that fuel pressure regulator was a waste of time like it was for me.

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mike loshbough

  • 1011 Answers
  • Posted on Mar 11, 2009

SOURCE: car wont start

check your fuel pressure it should be 35 psi .fuel pump relays dont go out but check all fuses with test light there is a fuel injector fuse but most likely problem is your fuel pump!

Anonymous

  • 563 Answers
  • Posted on Nov 12, 2009

SOURCE: how to replace fuel pump on 96 subaru legacy

You start by disconnecting the battery. Remove the fuel-pump, and put back the new one. Use some rag to catch up excess fuel. Safety: be very aware of the wiring conections.!

Anonymous

  • 1 Answer
  • Posted on Jan 09, 2010

SOURCE: 1999 chevy silverado 4.3 new

I just replaced the fuel pressure regulator and now I am hearing a vibrating noise from the fuel line under the truck. What do you think the problem is.

Anonymous

  • 1 Answer
  • Posted on Apr 07, 2013

SOURCE: How do you replace the fuel pump in 1992 2wd Subaru Legacy Wagon

How about just rolling up carpet behind seat and accessing fuel pump cover. unscrew cover sc.rews, disconnect plug and hose clamps use 8mm socket to pull bolts. Much easier than pulling gas tank

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I have a 1997 Subaru Legacy Outback (Station wagon). The last few times that I've gone home I would press the gas pedal but my car would just slow way down. I'd have to hit the pedal a couple of...

there are a couple of possible causes. I have found many older subaru's end up with poor ground connections for the fuel pump. Have the shop that changed the pump test the connection at the sending unit which is located behind the back seat under an access cover. if the connections are good then check the fuel pressure regulator. it uses rubber seals and they fail with age. lastly if the above items are good i suspect the fuel filter might need changing.
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1990 subaru legacy wagon fuel injectors are not getting fuel to start it

Check the pressure to the fuel rail then check it at the line before the fuel pressure regulator, it should be between 55 and 80 psi at the rail and 100 psi before the regulator, if you don't have pressure before the regulator then you have a fuel pump issue, if the rail pressure is low then you may need to replace the regulator.
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Turns over and won't start, replaced fuel filter and just turns over and almost fires

Almost fires? Do you mean it does fire some, that you know the plugs are getting spark? If so, then you probably need to have your fuel pressure tested to see if pump is working properly. Can you hear the pump buzz on briefly when you turn key to on? It should come on for a couple of seconds to pressurize the lines. If you don't hear it, then your pump may be bad, or something not turning pump on. Good luck.
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94 subaru legacy wagon will start and run for a few seconds if the fuel pump is disconnected but won't start at all when reconneced.

Check for a very dirty air filter or an obstruction in the air intake. (Engine not getting enough air so mixture is too rich.) Check for fuel pressure to be correct and not too high with the pump running. If it is too high, check that the fuel pressure regulator is working.

Try this: connect the fuel pump but disconnect the cold start fuel injector. If you can get it to start and run, then fuel pressure being too high is most likely. When the cold start injector turns on, the extra pressure is causing more fuel to flow through the injector than normal and the engine floods out.
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Why is my 1996 subaru legacy not getting fuel? Gets fire. fuel filter looks good and fuel pump engages. Any idea?

but if you have no fuel pressure it wont start. Spray some quick start. If it starts then you need to test for fuel pressure. If none or low, replace fuel pump.
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How do i relieve the pressure to replace the fuel filter?


 Disconnect the wiring connector of the fuel
pump.
 Crank the engine for more than five seconds.
If the engine starts, let the engine run until it
stops.
 After turning IG switch OFF, connect the wiring
connector of the fuel pump.
 Disconnect ground cable from battery.
2) Loosen the screw of the hose clamp and pull
off the hose from the filter.
3) Remove the filter from the holder.
4) Replace fuel filter with a new one
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1990 subaru legacy has fuel starvation problem where in cold weather fuel stops reaching fuel filter. Car stops and generally turning ignition back on starts pump and sending fule to fuel filter. Have...

Did you end up getting this fixed? Mine (same model, year) has a similar problem. I used a fuel additive to clean out the whole fuel system, carburetor, combustion chambers etc and it's helped heaps. But still struggles a little in the cold, still need to leave it running for a few mins before driving. About to replace the fuel filter now and see if it helps...
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2000 Subaru Outback wont start.. no fuel.

Are your injectors firing into the engine? You can buy a test kit to double check that. Is there spark at the plugs?

I had the same problem sorta with my civic it turns out after doing timing belt water pump, and many gaskets i had a huge vaccum leak.

Also check your fuel lines to see if they are loosing pressure somewhere
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Subaru Legacy LS 4WD won't fire

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