Fuel pump won't shut off.... - Third Generation F-Body Message Boards


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!

Fuel pump won't shut off....

Reply
 
Thread Tools Search this Thread
Old 04-12-2009, 10:04 AM   #1
Junior Member
Thread Starter
 
Join Date: May 2006
Posts: 12
Fuel pump won't shut off....

Pulled my '91 bird (3.1 v-6) out to get it ready for summer. The fuel pump stays running after the key is turned off. It's cold outside and I feel like crap so I just parked it and pulled the battery cable off for now.

Stuck relay maybe??
dave7310 is offline   Reply With Quote
Old 04-12-2009, 05:57 PM   #2
Senior Member
iTrader: (1)
 
Join Date: Jan 2007
Location: Mesa AZ
Posts: 684
Re: Fuel pump won't shut off....

Either that or thick oil. How long does it run when you turn the car off?
birdtojag is offline   Reply With Quote
Old 04-13-2009, 04:26 PM   #3
Junior Member
Thread Starter
 
Join Date: May 2006
Posts: 12
Re: Fuel pump won't shut off....

It ran for 10-15 min until i pulled the battery cable.

Thick oil? i was looking at the wiring diagram in the factory service manual and saw the oil sending unit was in the circut at the ECM.
Does the sending unit control the fuel pump in some way?
dave7310 is offline   Reply With Quote
Old 04-13-2009, 04:43 PM   #4
Member
 
8urv8's Avatar
 
Join Date: Feb 2009
Location: Cleveland,Ga.
Posts: 123
Re: Fuel pump won't shut off....

this is an electric in-tank pump, right?
if so, it's prolly gonna be a stuck fuel pump relay. take a hammer and tap it, plug it back in, and see if it still runs after that.
what does the oil have to do with the fuel pump????

Last edited by 8urv8; 04-13-2009 at 04:48 PM.
8urv8 is offline   Reply With Quote
Old 04-13-2009, 04:59 PM   #5
Junior Member
iTrader: (1)
 
Join Date: Sep 2007
Location: Canberra, the REAL capital of Australia!
Posts: 39
Re: Fuel pump won't shut off....

When you shut your car down, try turning the ignition back on but don't start the car. Does the oil light come on? I ask this because it's a common switch for the driver oil pressure warning lightalso also providing 12Volts for the fuel pump.

The fuel pump is switch to run once the oil pressure sees a certain amount of pressure. It should kill the pump when the motor stops because the oil pressure disappears.

You problem is more than likely, the oil pressure switch or the fuel pump relay.

Cheers,
Col.
bald_noggin is offline   Reply With Quote
Old 04-13-2009, 05:15 PM   #6
Member
 
8urv8's Avatar
 
Join Date: Feb 2009
Location: Cleveland,Ga.
Posts: 123
Re: Fuel pump won't shut off....

oh, kool. i learn something everyday!
8urv8 is offline   Reply With Quote
Old 04-13-2009, 05:40 PM   #7
Junior Member
Thread Starter
 
Join Date: May 2006
Posts: 12
Re: Fuel pump won't shut off....

Thanks guys,

I 'll check them both. I put a new sending unit in 3 years ago when i bought her ( gauge didn't work ) so i'm thinking it's the relay.
But ya never know...could be the new sender ?! lol
dave7310 is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1992 Camaro at first barely runs, now doesnt at all 92camaroJoe TBI 27 08-15-2016 03:33 PM
Please Help! Fuel Pump Not Working Glowsock Tech / General Engine 10 07-21-2016 01:38 PM
No fuel from my Injectors/ Won't start/Almost no noid light justin57 TBI 30 08-20-2015 07:05 PM
1992 Camaro at first barely runs, now doesnt at all 92camaroJoe Tech / General Engine 6 08-13-2015 06:07 AM
A no start gremlin djmarch Tech / General Engine 5 08-09-2015 05:27 PM


Go Back   Third Generation F-Body Message Boards >

Tags
87, 91, camaro, chevy, corolla, f150, firebird, fuel, key, off, pump, shut, stays, vortec, wont

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 10:50 AM.


All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: