LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Fuel pump problems HELP!

Thread Tools
 
Search this Thread
 
Old Mar 18, 2012 | 11:54 PM
  #1  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default Fuel pump problems HELP!

Alright a little back history, last thing I did to the car is put on new modified fuel rails, aromotive reg and then lost the fuel pump. Almost two years latter (this weekend) I put in a new pump and nothing! I swapped out the fuel pump relay with the one from my z28 and nothing. ( I know that one is good)
I know the pump is good because I checked it off the battery and also cheched the old one as well and it was good. So were do I start? Can the sending unit wire harness go bad? I'm lost! This car has been nothing but a pain in the *** since the 383 rebuild mind you the car only has 30,000 miles and it's a 97 ws6 Formula.
Reply
Old Mar 19, 2012 | 07:39 AM
  #2  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

All the views and no insight??
Reply
Old Mar 19, 2012 | 07:42 AM
  #3  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Have you checked the wiring for voltage at the relay? Any security light/VATS issues?
Reply
Old Mar 19, 2012 | 01:20 PM
  #4  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

I don't think it's VATS because I'm pretty sure I had them programed out ( it's been a while since the tune) I did put a test light on the plug were the pump harness plugs into the chassis and had a low signal but had some power but, the light was dim. I'm going to chech it with the fluke after work to see what the volts are at.
Reply
Old Mar 19, 2012 | 01:22 PM
  #5  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

By the way I dig you car! I'm just making another effort to get this car going again because it's not doing me any good sitting in the garage collecting dust!
Reply
Old Mar 19, 2012 | 07:50 PM
  #6  
Big Al's Avatar
TECH Resident
iTrader: (1)
 
Joined: May 2005
Posts: 970
Likes: 1
Default

Is the fuel pump circuit stock or did you change it? Did you cut the floor? If you did, just get a test lamp and print out the diagram from shbox.com and start checking.

Al 95 Z28
Reply
Old Mar 20, 2012 | 01:10 AM
  #7  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

Yep, I cut the trunk for the pump, I checked the sending unit harness and fuel pump wires and that is all good. I think I'm loosing current at the plug in the floor, but I have to check at the relay still but, I did try my relay out of my z and still same thing.
Reply
Old Mar 20, 2012 | 01:12 AM
  #8  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

O and yes fuel pump is still wired stock but I also have an inline pump with it's own relay. I was thinking of just running the in tank off of that relay if I don't get this traced down.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-5

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-6

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Mar 21, 2012 | 11:43 PM
  #9  
GASH1313's Avatar
Thread Starter
Staging Lane
 
Joined: Feb 2007
Posts: 52
Likes: 0
Default

The car is running as of tonight I had a broken wire.
Reply




All times are GMT -5. The time now is 03:30 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE