Search



Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Register Forgot Password?

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 Weld Racing
Click Here

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 04-12-2009, 10:04 AM   #1
Junior Member
 
Join Date: May 2006
Posts: 12
Car: 91 Firebird

Classifieds Rating: (0)
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 vBGarage Page   Reply With Quote
Old 04-12-2009, 05:57 PM   #2
Senior Member
 
Join Date: Jan 2007
Location: Mesa AZ
Posts: 679
Car: 87 Firebird, 90 bird coming soon
Engine: 355 Chevy Vortec Heads TPI, LT1 inj
Transmission: 700r4
Axle/Gears: 2.77 posi 9-bolt

Classifieds Rating: (1)
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 vBGarage Page   Reply With Quote
Old 04-13-2009, 04:26 PM   #3
Junior Member
 
Join Date: May 2006
Posts: 12
Car: 91 Firebird

Classifieds Rating: (0)
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 vBGarage Page   Reply With Quote
Old 04-13-2009, 04:43 PM   #4
Member
 
8urv8's Avatar
 
Join Date: Feb 2009
Location: Cleveland,Ga.
Posts: 123
Car: 1992 Camaro RS
Engine: 3.1L V6 w/.425" cam (Int. & Exh.)
Transmission: 700R4
Axle/Gears: Stock

Classifieds Rating: (0)
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 vBGarage Page   Reply With Quote
Old 04-13-2009, 04:59 PM   #5
Junior Member
 
Join Date: Sep 2007
Location: Canberra, the REAL capital of Australia!
Posts: 39
Car: 1971 GM Holden, HQ GTS Monaro Coupe
Engine: Gen I 350 Chev soon to have TPI
Transmission: TH400
Axle/Gears: Going to be a 3.55

Classifieds Rating: (1)
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 vBGarage Page   Reply With Quote
Old 04-13-2009, 05:15 PM   #6
Member
 
8urv8's Avatar
 
Join Date: Feb 2009
Location: Cleveland,Ga.
Posts: 123
Car: 1992 Camaro RS
Engine: 3.1L V6 w/.425" cam (Int. & Exh.)
Transmission: 700R4
Axle/Gears: Stock

Classifieds Rating: (0)
Re: Fuel pump won't shut off....

oh, kool. i learn something everyday!
8urv8 is offline vBGarage Page   Reply With Quote
Old 04-13-2009, 05:40 PM   #7
Junior Member
 
Join Date: May 2006
Posts: 12
Car: 91 Firebird

Classifieds Rating: (0)
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 vBGarage Page   Reply With Quote
Old 04-13-2009, 05:40 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine

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

 


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 07:33 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.5.2
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.

Emails & Contact Details