Do you have to prime fuel system? EFI
Thread Starter
Member
iTrader: (6)
Joined: Jul 2005
Posts: 443
Likes: 0
From: Northern Kentucky
Car: 1991 Trans Am GTA, 2003 Grand Am GT
Engine: 350 Tune Port
Transmission: 700R4
Do you have to prime fuel system? EFI
I replaced my fuel tank, fuel pump, filter, feed/return lines, and rebuilt my fuel rail. I energized the fuel pump and heard it humming and pushing air through the system but no fuel. Do I need to prime the pump somehow? I turned the pump off and on for at least 3 minutes.
Thanks for your help!
Thanks for your help!
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Do you have to prime fuel system? EFI
So long as the pump is drawing fuel and not air it should self prime.It could however be leaking up stream of the pump but still inside the tank
Thread Starter
Member
iTrader: (6)
Joined: Jul 2005
Posts: 443
Likes: 0
From: Northern Kentucky
Car: 1991 Trans Am GTA, 2003 Grand Am GT
Engine: 350 Tune Port
Transmission: 700R4
Re: Do you have to prime fuel system? EFI
I am not sure how it could leak. I did not use the pulsator but instead used high pressure fuel line with hose clamps. Something just seems odd. I would think the prime would prime by itself as well but fuel does not even sound like it is getting close to the rail. I jsut thought since the entire system does not have fuel it would need to be primed. It just sucks to be this close but not able to get the car started.
Supreme Member




Joined: Jan 2009
Posts: 2,313
Likes: 115
From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: Do you have to prime fuel system? EFI
pump running backwards?-check valve should keep it
from pumping backwards,but you will still hear it run
-take the feed hose off under hood,cover end with a rag
to prevent splash,run pump for a second to see if any
fuel is pumped,if not time to start checking...
from pumping backwards,but you will still hear it run
-take the feed hose off under hood,cover end with a rag
to prevent splash,run pump for a second to see if any
fuel is pumped,if not time to start checking...
Thread Starter
Member
iTrader: (6)
Joined: Jul 2005
Posts: 443
Likes: 0
From: Northern Kentucky
Car: 1991 Trans Am GTA, 2003 Grand Am GT
Engine: 350 Tune Port
Transmission: 700R4
Re: Do you have to prime fuel system? EFI
Wow, I hope that is not the case. I have no idea how it could be backwards as I used the existing harness. If it is in fact running backwards, can I just reverse the wires leading to the connector behind the back seat?
Thread
Thread Starter
Forum
Replies
Last Post
9192camaro
Engine/Drivetrain/Suspension Parts for Sale
16
Feb 3, 2019 12:21 AM
beachrodder
Tech / General Engine
7
Aug 25, 2015 08:05 AM






