Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Do you have to prime fuel system? EFI

Thread Tools
 
Search this Thread
 
Old Nov 16, 2009 | 09:23 PM
  #1  
wildjyoung's Avatar
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!
Reply
Old Nov 16, 2009 | 09:43 PM
  #2  
vetteoz's Avatar
Supreme Member
20 Year Member
iTrader: (13)
 
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
Reply
Old Nov 16, 2009 | 10:57 PM
  #3  
wildjyoung's Avatar
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.
Reply
Old Nov 17, 2009 | 12:00 AM
  #4  
8t2 z-chev's Avatar
Supreme Member
15 Year Member
Liked
Loved
Community Favorite
 
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...
Reply
Old Nov 17, 2009 | 07:38 AM
  #5  
wildjyoung's Avatar
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?
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Glowsock
Tech / General Engine
13
Jul 24, 2025 03:15 PM
Frozer!!!
Camaros for Sale
35
Jan 19, 2024 04:55 PM
midge54
LTX and LSX
21
Dec 27, 2019 04:14 PM
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




All times are GMT -5. The time now is 01:24 AM.