Fuel sender Question
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Fuel sender Question
I was wondering if there was any way to bench test a the gas tank sender to see if it is reading or working correctly. Maybe with a multimeter?
It's a 1982 Corvette
I wanted to check it before it went back in my tank. Also it's rather rusty, will that hurt anything? I have a carburated engine now and the stock elec fuel pump was removed from the assembly prior to me buying the car and a piece of tubing put in it's place. I'm pondering just going ahead and replacing it with a 78-81 carburated sender...but at $159 a pop, I would rather just use what I have.
Thanks!
It's a 1982 Corvette
I wanted to check it before it went back in my tank. Also it's rather rusty, will that hurt anything? I have a carburated engine now and the stock elec fuel pump was removed from the assembly prior to me buying the car and a piece of tubing put in it's place. I'm pondering just going ahead and replacing it with a 78-81 carburated sender...but at $159 a pop, I would rather just use what I have.
Thanks!
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
Yup - multimeter to measure resistance (Ohms).
It should range from 0-90 Ohms or so.
Not exactly sure for FI senders, but I think all are the same range.
You could coat the rusted areas with POR-15 before reassembling.
Just don't drip any into the sender itself.
It should range from 0-90 Ohms or so.
Not exactly sure for FI senders, but I think all are the same range.
You could coat the rusted areas with POR-15 before reassembling.
Just don't drip any into the sender itself.
Last edited by NHvette; Oct 14, 2005 at 12:56 PM.
Thread Starter
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
Originally Posted by NHvette
Yup - multimeter to measure resistance (Ohms).
It should range from 0-90 Ohms or so.
Not exactly sure for FI senders, but I think all are the same range.
You could coat the rusted areas with POR-15 before reassembling.
Just don't drip any into the sender itself.
It should range from 0-90 Ohms or so.
Not exactly sure for FI senders, but I think all are the same range.
You could coat the rusted areas with POR-15 before reassembling.
Just don't drip any into the sender itself.
I may go ahead and tape of the sender and wiring, blast off the rust with my sandblaster. Or will the POR-15 react with the gas in the tank?
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
Originally Posted by 1982CorvetteDude
Thanks!
I may go ahead and tape of the sender and wiring, blast off the rust with my sandblaster. Or will the POR-15 react with the gas in the tank?
I may go ahead and tape of the sender and wiring, blast off the rust with my sandblaster. Or will the POR-15 react with the gas in the tank?
It is the paint used to "seal" the inside of gas tanks ... mine included.
Pro
Joined: Mar 2005
Posts: 683
Likes: 4
The way I tested mine out of the tank was to hook up the wiring with the ignition off. Turn on the ignition and move the sender arm and watch the fuel gauge through the rear window. Also the 82 has an inner tank bladder made of a semi hard plastic material. On my tank the bladder came loose at the rear of the tank. When this happened my fuel gauge would only read half and above. The sending arm was getting stopped by the bladder. What I did was to exagerate the bend in the swing arm. To test this I attached a piece of fishing line next to the float. Then I put the sender unit in the tank and attached the wiring to the gauge. With the ignition on I could raise and lower the float to see if it was binding on the bladder. Hope this may Help.
Steve
Steve
