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Old 06-15-2013, 09:41 PM   #1
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Default what's the fuel pressure of the 2003 vvt engine?

I got an adjustable fuel pressure regulator a while back and I finally got around to putting it in. Now I can't seem to find what the fuel prssure should be. Any help?
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Old 06-15-2013, 09:57 PM   #2
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Per the factory manual, within the range of 53-61 PSI under all load conditions (from idle to WOT.)

I believe the nominal pressure is 400 kPa, which is around 58 PSI.
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Old 06-16-2013, 01:14 AM   #3
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Thank you kind sir. You have saved both me and my engine loads of horror lol
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Old 06-16-2013, 04:30 PM   #4
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Returnless fuel system.
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Old 06-16-2013, 04:37 PM   #5
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Returnless fuel system.
Man with large hat.
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Old 06-16-2013, 04:42 PM   #6
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Is it an in tank adjustable fpr? I'm curious to see how that's working on a return less system. Enlighten me.
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Old 06-16-2013, 09:45 PM   #7
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Quote:
Originally Posted by flounder View Post
Is it an in tank adjustable fpr? I'm curious to see how that's working on a return less system. Enlighten me.
Using the evap line as a line back to the tank with it moved at the tank to go into the unused return line port on the tank and run a custom tune to compensate for the fact that your fuel pressure now changes based on manifold vacuum rather than stays static.
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Old 06-17-2013, 12:21 PM   #8
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Quote:
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Is it an in tank adjustable fpr? I'm curious to see how that's working on a return less system. Enlighten me.
I have the fpr in a 94 chassis that has a full 2003 engine, hanress, and ecu. Still has the na gas tank and lines
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Old 06-17-2013, 12:38 PM   #9
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The ***** Mightier.
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Old 06-17-2013, 05:43 PM   #10
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The ***** Mightier.
I don't quite fallow but a beautiful statement none the less.
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