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!

helper(vapor lock) fuel pump issues

Thread Tools
 
Search this Thread
 
Old 08-19-2009, 11:47 PM
  #1  
Junior Member
Thread Starter
 
pantywaste33's Avatar
 
Join Date: Apr 2009
Posts: 22
Likes: 0
Received 0 Likes on 0 Posts
Car: 1984 z28
Engine: 5.7 vortec crate
Transmission: 700r4
helper(vapor lock) fuel pump issues

hi, i have a 1984 z28 with a 350 vortec crate and a holley 650 carb. after many headaches i found that this particailar model camaro has 2 fuel pumps. the one in the tank is supposed to prevent vapor lock, which leads me to my problem. the helper pump is constantly running! and i cant unplug it and just use my pump under the hood cuz itll stall like crazy. so, i guess i need some advice on rewiring my tank pump so i dont have to keep unhooking my battery everytime i park.
thanx, mitch
Old 08-20-2009, 02:39 PM
  #2  
Moderator

iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 43,169
Likes: 0
Received 35 Likes on 34 Posts
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Welcome aboard thirdgen.org.

Sounds like you've got a stuck fuel pump relay, either internally fused somehow or another, or getting energizing power constantly from a sneak circuit.

I can't tell you exactly where to look for it, but I believe it is in the rear driver side corner of the engine compartment (I'd be more than happy to be corrected on this).
Old 08-20-2009, 05:28 PM
  #3  
Junior Member
Thread Starter
 
pantywaste33's Avatar
 
Join Date: Apr 2009
Posts: 22
Likes: 0
Received 0 Likes on 0 Posts
Car: 1984 z28
Engine: 5.7 vortec crate
Transmission: 700r4
Re: helper(vapor lock) fuel pump issues

thanx for the reply five7kid. i fixed it today. i found the hot wire to the pump and ran it to my fuse box where i hooked it up to my guages. now it only comes on with the key turned. this is the only car ive ever seen with two fuel pumps. its really weird. i wish they couldve just made one powerful pump instead of using two, but oh well. its working now.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frozer!!!
Camaros for Sale
35
01-19-2024 04:55 PM
92camaroJoe
TBI
32
07-29-2023 07:57 PM
Glowsock
Tech / General Engine
11
08-02-2020 07:36 PM
Infested
Tech / General Engine
3
05-22-2018 11:56 PM
92camaroJoe
Tech / General Engine
6
08-13-2015 06:07 AM



Quick Reply: helper(vapor lock) fuel pump issues



All times are GMT -5. The time now is 09:12 PM.