What is fuel pressure supposed to be ???
Registered User
Joined: Sep 2000
Posts: 1,249
From: Kingman, AZ
With the vac line off the regulator it should be 43.5 
then the regulator takes over from there. But i can't tell u for sure what it would be around at idle or WOT. If its at 43.5 with vac line off then you should be good to go.
Brad
then the regulator takes over from there. But i can't tell u for sure what it would be around at idle or WOT. If its at 43.5 with vac line off then you should be good to go. Brad
Administrator
Joined: Nov 1998
Posts: 71,098
From: Hell was full so they sent me to NJ
The spec is 43.5psi, +/-2.5psi, so at idle, no vacuum line, anything from 41-46psi is "OK". Connect the vacuum line, and the pressure should drop in proportion to intake manifold vacuum, or 6 to 8psi on a stock cam.
To measure the pressure at WOT, you have to be at WOT, max load/max rpm. The pressure should stay within 1 or 2psi of the "no vacuum" reading. Simply measuring the idle pressure without the vacuum line connected will not tell you if the pump can supply the demands at full load.
To measure the pressure at WOT, you have to be at WOT, max load/max rpm. The pressure should stay within 1 or 2psi of the "no vacuum" reading. Simply measuring the idle pressure without the vacuum line connected will not tell you if the pump can supply the demands at full load.
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