HELP!!! Adjustable Fuel Pressure Regulator.
Thread Starter
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
HELP!!! Adjustable Fuel Pressure Regulator.
Which way turns the pressure DOWN? I'm getting readings of 72psi while cranking and the screw is almost all the way out of the regulator. This is much too high! I need about 42psi. Does clockwise turn it down? I'll be back in a few, gotta go get an EGR gasket.
Intermediate
Joined: Apr 2002
Posts: 46
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From: Silverdale WA
Re: HELP!!! Adjustable Fuel Pressure Regulator. (scorp508)
Counter clockwise or out should lower the pressure. I think my screw has about 1/2 turn left before it falls out and I got it down to 45 with vacuum...about 55 without.
Team Owner
Joined: Dec 2000
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From: SE NY
Cruise-In II Veteran
Re: HELP!!! Adjustable Fuel Pressure Regulator. (scorp508)
Screwing it in compresses the diaphram raising the pressure.
Wow Scorp, do you have a hi-flow pump; that's extreme pressure. If it's real, don't run the injectors long or could cause problems.
How about installing another gauge onto the Schraeder to check your in car gauge.
What pressure does it prime the rail to when you just turn the key to On but don't start?
[Modified by 65Z01, 4:03 PM 5/15/2002]
Wow Scorp, do you have a hi-flow pump; that's extreme pressure. If it's real, don't run the injectors long or could cause problems.
How about installing another gauge onto the Schraeder to check your in car gauge.
What pressure does it prime the rail to when you just turn the key to On but don't start?
[Modified by 65Z01, 4:03 PM 5/15/2002]
Le Mans Master
Joined: Oct 1999
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From: Sachse Texas
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Re: HELP!!! Adjustable Fuel Pressure Regulator. (scorp508)
Left turn Clyde. If you got it all the way out and it still shows that high with the motor running and the vacuum line disconnected, then I would say there is a problem with the AFPR.
Melting Slicks
Joined: Apr 2000
Posts: 2,793
Likes: 46
From: Elizabeth City, NC
Re: (scorp508)
You need to check with a mechanical pressure gauge. Almost all electric gauges are off a fair amount except for the $200 autometer ones. I had the same problem with the Cyberdyne/Intellitronix gauges. I even had a VDO FP gauge that was way off.
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Re: (scorp508)
