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Low Fuel pressure

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Old 04-10-2005, 10:17 PM
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Low Fuel pressure
i have just installed a fuel pressure gauge , and it seem that i have 30lbs .. is it enough ? i ve seen it supposed to be at 39lbs , is it right ?
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Old 04-11-2005, 06:38 AM
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38-39lbs for stock, 30 is kinda low
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Old 04-11-2005, 04:41 PM
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Yep Same as above
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Old 04-11-2005, 06:15 PM
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Originally Posted by cobragt86
38-39lbs for stock, 30 is kinda low
do you think my stock fuel regulator is not good anymore ? and what kind of problem i can have whit a low pressure ... a ran all last summer and i never had a trouble (i did nt know that my pressure was low like that)
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Old 04-11-2005, 06:57 PM
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you run the risk of leaning out and blowing a headgasket with low fuel pressure. it very well could be that your regulator has started to take a dump, or even your fuel pump. i say swap your reg with a buddies to see if it makes a difference, if it doesn't it's the pump, if it does it's the rgulator...
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Old 04-11-2005, 07:15 PM
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Originally Posted by Stock865.0
you run the risk of leaning out and blowing a headgasket with low fuel pressure. it very well could be that your regulator has started to take a dump, or even your fuel pump. i say swap your reg with a buddies to see if it makes a difference, if it doesn't it's the pump, if it does it's the rgulator...
serious !! i drove all summer , daily drive , a dozen time a the track and 2 entire days of lapping ... foot on the floor ! !

.. i will make some test !
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Old 04-11-2005, 08:01 PM
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low pressure
Last summer my 99gt started to hesitate(40,000kms) first thing in the morning. Two months ago while the car was stored I went to start it and it pooped out on me. I had to replace the fuel pump. The Ford dealer wanted almost 800.00 all told. OUCH :laughhard
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Old 04-11-2005, 09:50 PM
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How much fuel pressure do you have with the car running and the vacuum line to the regulator disconnected?
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Old 04-14-2005, 09:15 PM
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DeltaP is 39.5psi and on your gauge, if you are boosted you will see an increase of 1psi for almost 1lb of boost.

If you are falling below deltap, you have a problem.
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Old 04-14-2005, 10:40 PM
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What do you mean by DeltaP...never heard that lingo before
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