help
Thread Starter
Junior Member
Joined: Sep 2013
Posts: 1
Likes: 0
From: Texas
Car: Firebird 89
Engine: 6v
Transmission: 5 speed
help
Hello, Im new to this site. I have a question about the fuel pump. the psi shows about 45 to 50 psi. But when i drive the car the psi drops rapidly when i give it gas. any help? 
the car is a 1989 firebird
the car is a 1989 firebird
Supreme Member
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: help
how rapidly?? and what does your FP drop to?? mine sees around 30-35 psi @WOT.
Joined: Sep 2005
Posts: 27,918
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: help
It should in fact GO UP when you give it gas.
Should be something around 38ish idling, and 43ish at WOT.
If it drops when you give it gas, then it's probably also stumbling, has no power, etc. etc. which is why you're measuring it in the first place? (most of us don't just get a wild hair between our cheeks and up and watch the FP while driving around, for no reason at all... although certainly not ALL of us)
What did your old fuel filter look like? did a bunch of rust or gunk or anything come out of it when you changed it?
Should be something around 38ish idling, and 43ish at WOT.
If it drops when you give it gas, then it's probably also stumbling, has no power, etc. etc. which is why you're measuring it in the first place? (most of us don't just get a wild hair between our cheeks and up and watch the FP while driving around, for no reason at all... although certainly not ALL of us)
What did your old fuel filter look like? did a bunch of rust or gunk or anything come out of it when you changed it?