C4 General Discussion General C4 Corvette Discussion not covered in Tech

93 6spd Corvette, constantly on

Thread Tools
 
Search this Thread
 
Old Apr 15, 2022 | 09:21 AM
  #1  
rrwebster's Avatar
rrwebster
Thread Starter
Instructor
10 Year Member
 
Joined: Jun 2010
Posts: 116
Likes: 2
From: Webster Florida
Default 93 6spd Corvette, constantly on

I have a 93 corvette with a 6spd trans.the fuel pump runs constanly and I just don't know why. Can anyone tell me where to turn it off at?

thanks in advance,

Robert
Reply
Old Apr 15, 2022 | 10:00 AM
  #2  
RR40vette's Avatar
RR40vette
Racer
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Sep 2008
Posts: 263
Likes: 12
From: k-town
Default

fuse?
Reply
Old Apr 15, 2022 | 10:28 AM
  #3  
rrwebster's Avatar
rrwebster
Thread Starter
Instructor
10 Year Member
 
Joined: Jun 2010
Posts: 116
Likes: 2
From: Webster Florida
Default Clarification

Yeah I've been unhooking the battery I could pull the fuse but I really want to try to correct the situation the key off the fuel pump runs and the only way to stop it is to disconnected the battery and if you disconnect the battery and reconnect it the moment that you touch the key again it starts up and it starts up and stays running unless the key is on if the key is on the fuel pump won't work.
Reply
Old Apr 15, 2022 | 11:42 AM
  #4  
FAUEE's Avatar
FAUEE
Race Director
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Oct 2012
Posts: 17,405
Likes: 6,537
From: Melbourne, FL
Default

I'd check relays and wiring. Did you just buy the car? It's possible a previous owner rigged it to run constantly, or on another switch somewhere vs fixing the issue.
Reply
Old Apr 15, 2022 | 12:39 PM
  #5  
pedricd's Avatar
pedricd
Drifting
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Jun 2020
Posts: 1,355
Likes: 396
From: Northwest Ohio
Default

Sounds like a stuck relay...find it and give it a good whack and see if it shuts off. You will also be able to test at the relay to see if the connector is receiving power when it shouldn't...easy to test.
Reply
Old Apr 15, 2022 | 12:44 PM
  #6  
topfuel67's Avatar
topfuel67
Drifting
Conversation Starter
All Eyes On Me
Photogenic
Photoriffic
 
Joined: Feb 2016
Posts: 1,386
Likes: 339
From: Simi Valley CA
Default

Do you have a FSM? I would start by checking if there is 12V on both sides of the fuse with the fuse out. Then check the relay. Try to narrow it down. I would guess that the relay is stuck open, but would think power is cut off to it completely when the car is off. The FSM should be able to show you if it has a constant 12V source as one of the pins.
Reply
Old Apr 15, 2022 | 12:47 PM
  #7  
383vett's Avatar
383vett
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2003
Posts: 17,700
Likes: 1,667
From: moraga ca
Default

Relay is on the firewall. Find it, test it, replace it.
Reply
Old Apr 15, 2022 | 12:59 PM
  #8  
rrwebster's Avatar
rrwebster
Thread Starter
Instructor
10 Year Member
 
Joined: Jun 2010
Posts: 116
Likes: 2
From: Webster Florida
Default

Originally Posted by 383vett
Relay is on the firewall. Find it, test it, replace it.
Yes new purchase inside or outside firewall?
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-1

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-2

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-3

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-4

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-5

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-6

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-7

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-8

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-9

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
Old Apr 15, 2022 | 01:03 PM
  #9  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
Default

If you have the FSM the relay is actually under the dash right side. 8A-201-6 should enable you to get there. If you've the FSM I'd think diagnostics pretty straight forward also. Swap maybe another relay from under the dash and see if it corrects the issue might be a reasonable next step? '93 was also the first year for the Under-Hood MAXI boxes. The MAXI is the direct source of the FP Relay power. IP FP Relay is after the relay so removing the IP fuse should work until fixed.

Do you have the FSM?





Last edited by WVZR-1; Apr 15, 2022 at 01:21 PM.
Reply
Old Apr 15, 2022 | 01:14 PM
  #10  
Tom400CFI's Avatar
Tom400CFI
Team Owner
Pro Mechanic
20 Year Member
 
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Default

Could be stuck oil pressure switch, foo. I'd test that, and I'd test the relay, as has been suggested. One of those two things is 'shorted' closed.
Reply
Old Apr 15, 2022 | 01:19 PM
  #11  
rrwebster's Avatar
rrwebster
Thread Starter
Instructor
10 Year Member
 
Joined: Jun 2010
Posts: 116
Likes: 2
From: Webster Florida
Default

Do you have the FSM?
Yes

from. You!!!

Reply
Old Apr 15, 2022 | 01:46 PM
  #12  
WVZR-1's Avatar
WVZR-1
Team Owner
20 Year Member
Veteran: Army
Active Streak: 30 Days
Liked
 
Joined: Sep 2003
Posts: 25,406
Likes: 2,744
Default

Originally Posted by rrwebster
Yes

from. You!!!
I try to 'always' suggest to any new/recent buyer to get a FSM and when they get it spend some time in the 8A-201 Section (Component Location Views). Very good section of the FSM to use for getting acquainted.
Reply
Old Apr 15, 2022 | 03:23 PM
  #13  
rhandle's Avatar
rhandle
Burning Brakes
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2007
Posts: 765
Likes: 50
From: West Palm Beach,Florida
Default You

Originally Posted by wvzr-1
if you have the fsm the relay is actually under the dash right side. 8a-201-6 should enable you to get there. If you've the fsm i'd think diagnostics pretty straight forward also. Swap maybe another relay from under the dash and see if it corrects the issue might be a reasonable next step? '93 was also the first year for the under-hood maxi boxes. The maxi is the direct source of the fp relay power. Ip fp relay is after the relay so removing the ip fuse should work until fixed.

Do you have the fsm?



you are amazing!
Reply

Get notified of new replies

To 93 6spd Corvette, constantly on





All times are GMT -4. The time now is 11:43 PM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE