Fuel pump
Thread Starter
Instructor
Joined: Feb 2005
Posts: 140
Likes: 0
From: cookeville tn
Fuel pump
Is their a way to check the fuel pump. Can I just put power to the grey wire and ground the black. Will the pump work if its good.
the vette is a 1990.
thanks in advance.
the vette is a 1990.
thanks in advance.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
You can use a paper clip; insert it into the ALDL connector (under the driver's side of the dash) and the pump will energize (come on) if it's good.
I forgot which terminals to use, but I'm sure someone will post them; probably a diagram too.
Jake
I forgot which terminals to use, but I'm sure someone will post them; probably a diagram too.
Jake
Racer
Joined: Sep 2008
Posts: 456
Likes: 0
From: FL
Race Director
Joined: Sep 2003
Posts: 16,836
Likes: 337
From: Database Error Indiana
Giving it power can make it run, but you may want to use a pressure guage to see how well its working. To really test it, you can hook up a guage and tape it to the windshield and watch it while driving.
Thread Starter
Instructor
Joined: Feb 2005
Posts: 140
Likes: 0
From: cookeville tn
Car has been tore down for about 2 years. I have been doing the paint and the interior. I put the battery in it and it's not getting any fuel. It starts right up if I put fuel in TB. Car ran perfect when I parked it. Any help would be helpful. Thanks
Race Director
Joined: Jan 2005
Posts: 10,641
Likes: 13
From: Slidell Louisiana
Le Mans Master
Joined: Oct 2003
Posts: 6,130
Likes: 2
From: seattle WA
1990 was still an OBD1, with the 12 pin ALDL, MAKE sure you confirm the fuel pump pin, but on earlier OBD1s you can run a wire from the positive side of the battery to pin G, lower row on ALDL on the left side, should only be one pin there, that will bypass the fuel pump circuit and power up the pump (if it's still good).
You said you were working on the interior, did you remove any fuses?
You said you were working on the interior, did you remove any fuses?
Thread Starter
Instructor
Joined: Feb 2005
Posts: 140
Likes: 0
From: cookeville tn
No I didn' remove any fuses. I just put all new carpet it, new door panels, new door sills, and new radio bezel. I ran a hot wire to the ALDL and the pump didn't come on. When the car had been sitting for about a month, I heard a clicking coming from the passenger side of dash. So I unhooked the battery. I was thinking maybe the relay was bad but I should still be able to bypass and hear it run. I will get a new relay and pump and go from there. Thanks everyone.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Safety Car
Joined: Jul 2004
Posts: 3,835
Likes: 30
1990 was still an OBD1, with the 12 pin ALDL, MAKE sure you confirm the fuel pump pin, but on earlier OBD1s you can run a wire from the positive side of the battery to pin G, lower row on ALDL on the left side, should only be one pin there, that will bypass the fuel pump circuit and power up the pump (if it's still good).
You said you were working on the interior, did you remove any fuses?
You said you were working on the interior, did you remove any fuses?
...
