Fuel Pump And Sending Unit
Thread Starter
Melting Slicks
Joined: Aug 1999
Posts: 2,619
Likes: 1
From: Whidbey Island Washington
Fuel Pump And Sending Unit
What is difference in a fuel pump and gas guage sending assembly from an 88-91 and one for the '93 ZR1.. or they interchangable?. Thanks in advance.
Last edited by ZRWON; Dec 18, 2005 at 07:34 PM.
Melting Slicks
Joined: Oct 2004
Posts: 2,283
Likes: 0
From: Leeds Alabama
They are NOT interchangeable, different lines and number of lines also the Zr1 was calibrated differently (I think) starting in 93 to read the 18 gallon smaller tank due to weight issues.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
As far as I know, calibration on any GM (or domestic production for that matter) fuel gauge has been the same forever - 90 ohms full, 45 ohms half, completed circuit or 0 ohms empty. Getting the float arm to fit into the tank might be another issue, but the sending unit itself may be similar if not the same. Check Tech Tips since there's a good write up on how to fix it and if it still has pictures, you can at least compare it to what you've got. As to the pump, I know the LT5 is a little bit more since they stuck the extra wire it needs in my pump harness - drove me nuts until I finally discovered what it was for in the body schematics at the end of the Shop Manual.
Melting Slicks
Joined: Oct 2004
Posts: 2,283
Likes: 0
From: Leeds Alabama
Originally Posted by SunCr
As far as I know, calibration on any GM (or domestic production for that matter) fuel gauge has been the same forever - 90 ohms full, 45 ohms half, completed circuit or 0 ohms empty. Getting the float arm to fit into the tank might be another issue, but the sending unit itself may be similar if not the same. Check Tech Tips since there's a good write up on how to fix it and if it still has pictures, you can at least compare it to what you've got. As to the pump, I know the LT5 is a little bit more since they stuck the extra wire it needs in my pump harness - drove me nuts until I finally discovered what it was for in the body schematics at the end of the Shop Manual.
