Quote:
Originally Posted by BNaylor
There is nothing wrong with your fuel pressure so why waste the money or continue spinning your wheels. For your engine fuel pressure should be in a range of 50-60 psi per the GM Factory Service Manual.
Further, you should not be running E85 gasoline especially with mods. Premium unleaded 91 octane or better. I don't recall any Grand Prix year or model being Flexfuel capable.
Final note is if you decide to change the fuel pump assembly unlike the '97-'03 GP models you have to drop the gas tank. There is no longer an access cover in the trunk area that can be removed. |
on the new gtps i know theres no panel but i have a friend with a shop
and min fuel pressure is 60 psi and max is 62 i have read everywhere that fuel pressure is suppose to rise the more you press
on the older gtp the fuel pressure was lower look
soorry this is the only proof i could find
http://www.autozone.com/autozone/par...=87023_5356_0_
see min psi is 60 at 20 % throttle mine drops to 59 from 61 and continues to drop and why do i go lean at 130 mph???