fuel pump runs constantly
#1
fuel pump runs constantly
i have a 91 rs with a carbed 350 in it. i recently changed my oil pressure sensor by the oil filter. after driving it today i turned the car off and my fuel pump continued to run until i pulled the fuse for it. i put the fuse back in and disconnected the fuel pump relay and it still ran. it only stops when i disconnect my oil pressure sensor. do you think my sensor that i put in a week ago is already bad and constantly sending power to the pump? it still reads oil pressure just like it is supposed to when running and it goes to 0 when i turn the car off.
also i have been thinking about putting a switch in for the fuel pump. what is the best / easiest way to wire a manual switch into the system?
also i have been thinking about putting a switch in for the fuel pump. what is the best / easiest way to wire a manual switch into the system?
Last edited by 91 camaro racer; 03-23-2014 at 01:35 AM.
#2
Supreme Member
iTrader: (13)
Join Date: Apr 2005
Location: Not in Kansas anymore
Posts: 7,732
Likes: 0
Received 11 Likes
on
11 Posts
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: fuel pump runs constantly
The circuit in the sender for gauge is separate to the circuit for pump
#5
Re: fuel pump runs constantly
It's possible that the parts counter gave you the wrong switch. Most cars with instrument panels using idiot lights used a normally closed oil pressure switch, so they are fairly common. The auxiliary switch on our cars must be normally open, closing on rise at 10 PSI and opening at 7 PSI.
#6
Re: fuel pump runs constantly
It's possible that the parts counter gave you the wrong switch. Most cars with instrument panels using idiot lights used a normally closed oil pressure switch, so they are fairly common. The auxiliary switch on our cars must be normally open, closing on rise at 10 PSI and opening at 7 PSI.
#7
Member
iTrader: (1)
Join Date: Oct 2012
Location: SLC, UT
Posts: 326
Likes: 0
Received 1 Like
on
1 Post
Car: 1991 GTA
Engine: LB9
Transmission: T5
Re: fuel pump runs constantly
It is very likely the switch is bad.
The parts store brand electronics are sketchy at best when it comes to longevity.
Whenever I need sensors/modules/or any other under hood electrical item, I buy OEM if available, or the top of the line NAPA offering if I can't get OEM.
The parts store brand electronics are sketchy at best when it comes to longevity.
Whenever I need sensors/modules/or any other under hood electrical item, I buy OEM if available, or the top of the line NAPA offering if I can't get OEM.
Trending Topics
#8
Re: fuel pump runs constantly
it worked correctly for awhile. then it just started making the pump run all the time. here is the one i got...http://www.autozone.com/autozone/par...4_652063_8450_
Thread
Thread Starter
Forum
Replies
Last Post
theshackle
Tech / General Engine
4
03-05-2017 06:37 PM
92camaroJoe
Tech / General Engine
6
08-13-2015 06:07 AM