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Old 03-25-2004, 09:48 PM   #1
Jgrahn555
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Question What is base fuel pressure?

What is the base fuel pressure for the '99 2.5L DOHC?
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Old 03-26-2004, 10:02 AM   #2
Legacy777
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AWD 6MT EJ22T AWIC Swap

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should be close to the ej22. I've got that info if you don't have it already.

I'm assuming you're trying to compare. You having any problems with the new setup?
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Old 03-26-2004, 04:58 PM   #3
Jgrahn555
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Quote:
Originally posted by legacy777
should be close to the ej22. I've got that info if you don't have it already.

I'm assuming you're trying to compare. You having any problems with the new setup?
Correct. The base pressure of the 2.2L is 36.6psi. I've got enough fuel during acceleration, but there isn't enough pressure to sustain the engine at idle and cruise. it bubbles up and down for a few minutes then dies.

You have any info on the 2.5 in those manuals of yours? I suppose it's time for me to go out and buy the 99 2.5L DOHC engine service manual.
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Old 03-26-2004, 05:08 PM   #4
Hawk296
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35.5 at idle, 45 at idel with fuel pressure regulator disconnected.
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Old 03-26-2004, 05:17 PM   #5
Legacy777
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what happens when at cruise......

Honestly....the problem doesn't make much sense. The fuel pump has no controller on the older cars, it's just on, and the regulator bypasses excess fuel back to the tank. If you have enough during acceleration, you should have enough during idle and cruise.

if your problem was just idle....I'd say look at the IAC valve. But since it's also under steady state cruising.....then that's a little more difficult.

You may want to take some readings from your O2 sensor to see if you're becoming extremely lean or rich during those times the engine dies. It's possible your ECU is not controlling the engine properly....
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