93 eurospec legacy fuel pressure problem - Subaru Outback - Subaru Outback Forums
 
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post #1 of 4 (permalink) Old 02-16-2017, 07:00 PM Thread Starter
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93 eurospec legacy fuel pressure problem

Hello.

I have a fuel pressure problem.

The car is an legacy 2.2 1993.

At idle the pressure is 28 psi 1.9 bar .

The problem is when i disconnect the vacumm line on the fuel pressure regulator, the pressure goes up to 2.4 bar 35 psi but its take 2.5 seconds.normaly it should rise with no delay ?
Wath can make the fuel pressure regulator increasing the pressure so slowly ?

I have replaced the fuel pump and when i pinch the return line the pressure rise to 5 bar 70 psi with no delay

I have try to swap 2 old fuel regulator but the problem stay he same.

I dont want to buy an new fuel pressure regulator when not necessary....

Have you an idea ?

Thank you

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post #2 of 4 (permalink) Old 02-17-2017, 11:40 AM Thread Starter
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Fuel pressure increase slowly when i disconnect vacuum line

Hello.

I have a fuel pressure problem.

The car is an legacy 2.2 1993.

At idle the pressure is 28 psi 1.9 bar .

The problem is when i disconnect the vacumm line on the fuel pressure regulator, the pressure goes up to 2.4 bar 35 psi but its take 2.5 seconds.normaly it should rise with no delay ?
Wath can make the fuel pressure regulator increasing the pressure so slowly ?

I have replaced the fuel pump and when i pinch the return line the pressure rise to 5 bar 70 psi with no delay

I have try to swap 2 old fuel regulator but the problem stay he same.

I dont want to buy an new fuel pressure regulator when not necessary....

Have you an idea ?

Thank you

power12 is offline  
post #3 of 4 (permalink) Old 02-17-2017, 11:51 AM
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merged your thread from yesterday. and moved it to the "all other models section",...as this forum kind of starts at 1995 US spec. vs. the earliest legacys.

you should ask this on the Ultimate Subaru Message Board, where there are more people typing and archiving about cars older then 1995.

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post #4 of 4 (permalink) Old 02-17-2017, 02:26 PM
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You don't have a fuel pressure issue.

If you think you do you should describe the symptoms and diagnosis so far at least.

Read the check engine codes and tell us what you get.

Aftermarket fuel pumps aren't very robust or near OEM quality.

Vehicle history is helpful as well. You drive this car 20 years problem free and it has issues one day....or you just bought it for cheap from some shady guy who pulled the motor and transmission out and put it back in with jacked up wiring harnesses...or you just had major maintenance work done and now it has issues....or it's has other issues in the past that may be related....
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