z28poweredlt1

alright well i jsut checked the fuel pressure regulator white the engine was running and gas came out of the vaccuum side, so the part is on its way and we'll see what it'll do.

z28poweredlt1

damned fpr was 60 bucks, do i have to remove the whole fuel rail to change the regulator?

GreenDemon

Yes, you have to remove the fuel rail- the fpr is under the cowl, its a pita just to put a gauge back there, and No, it's not very hard at all- Take the fuel lines and four screws off and pull off the fuel rails (carefully) with the injectors... after you unplug and label them, of course...

scoobysnax83

you upgraded it right?

or I'll be the one laughing

Edit: I see above that you upgraded to a Walbro...good call

z28poweredlt1

no i jsut went with oem becuase i'm an ac delco wholesale distributor and it was real cheap

scoobysnax83

well, atleast you have the access hole for when you want to upgrade later. So you can get stuff wholesale, ehh. Wanna make some friends.

z28poweredlt1

tell me what you need and i'll let you know

scoobysnax83

nothing really... but I'll keep you in mind

IanZ28

The replaced fuel pump fixed my starting problem.

TArider21

I wish my problem was only the FPR, gonna put walboro/racetronix fuel pump in hopefully this weekend, dropping the tank!

pvkn1ght

my problem is similar (not trying to hijack thread )

1. the car, in general, takes around 5-6 seconds of cranking to start, much slower than other fbods i've owned/ridden. but it starts strong after that.

2. if the car sits in a 15min-1hour window, it will start very slow with low stumbling rpms followed by 15-20secs of high revs at 2000rpm. if i turn it off and try again, it's fine.

3. i've cleaned the tb, iac, replaced a slightly ripped intake elbow with a new 1LE, have nto yet replaced fuel filter

4. i notice that in the 'ON' position (when the pump primes with that whirring sound), the pressure is at ZERO. i read somewhere it should be at ~40psi? the guage shows pressure when driving though.

THANKS FOR TAKING THE TIME TO READ THIS. please help

how do you check if the fpr is good/bad? something about a shraeder valve very noob @ fuel syst. thanks

Brian

z28poweredlt1

try this, pull off the little vaccum line on the fpr after the engine has been run for about a minute or so, if there is any gas or moisture from gas then you'll need to replace it.

z28poweredlt1

well sure enough the number one cylinder's injecter would freeze open once the pulse stoped, that explained the fuel pump pressure dropping rapidly when i shut the car off, so i cleaned all the injectors with the ultra sonic machine, new filters and seals and tested again 3 times, no problems and all of the injectors flowed the same on the chart! replaced the fpr cause that was bad too and now the car starts up very very well , I'll find out tomorrow morning how she starts and I'll post again, let me know if you need anything new acdelco and i'll see if i can help because i know you sure helped me, thanks man.

-Mark

scoobysnax83

all that matters is that its fixed. Hey how much does a shop generally charge for cleaning injectors. And, would it be cheaper if I brought them in already off the fuel rail?

I'm thinking of doing it for the hell of it

badass383

?