1988 Fuel Sending unit differences?
Thread Starter
Cruising
Joined: Apr 2016
Posts: 12
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1988 Fuel Sending unit differences?
What is unique to the 1988 fuel sending unit? Is it not a standard 0-90 ohm resistor float?
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Team Owner
Joined: Sep 2003
Posts: 25,394
Likes: 2,741
What is unique to the 1988 fuel sending unit? Is it not a standard 0-90 ohm resistor float?
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Since you have both are the wire colors in the same cavities on the connector? Colors on each? I have an '87 and an '88 FSM and I can check the wiring for population at the connectors. It's likely that maybe the "service unit" that you have doesn't have correct wires anyway.
I see different part #'s in the SPO information but certainly never tried to sort it. If an exchange was just a couple days away depending on the vendor maybe an exchange is effortless. I'm guessing this was "your mistake"?
*** Sender is 90Ω just like previous - the only obvious thing that I can see different is the sender wire color in terminal B - '88 is PPL and earlier is PNK, C -TAN/WHT (both), A - BLK (both). I can't tell if the connector is indexed the same or not but I would think so.
Last edited by WVZR-1; Apr 16, 2016 at 07:09 PM.
Racer
Joined: Dec 2003
Posts: 277
Likes: 3
What is unique to the 1988 fuel sending unit? Is it not a standard 0-90 ohm resistor float?
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Background
I just picked up an 88 that was in non-running condition due to sitting. Fuel tank was full of varnish thick enough to refinish furniture. I cleaned out the tank, cleaned up the sender, and put on a new fuel pump, just to get it running. The float sensor was badly rusted, so I ordered a new sending unit. Accidentally received a unit for an 85-87. This unit looks exactly like what I have in my car. Neither has the pulse dampener. I cannot get the old one to test at all on a multi meter. I am trying to figure out if I have to send what I received back and wait for another replacement, or if it can be made to work.
Last edited by frank j. moran; Apr 16, 2016 at 07:25 PM.
Thread Starter
Cruising
Joined: Apr 2016
Posts: 12
Likes: 2
So I took a chance and installed it anyway. The exterior electrical connection looked the same, but had small slits on different places than original. A pair of snips remedied the issue. I am reading two bars with a little over 4 gallons of gas total in the tank. So far I think it worked.
Team Owner
Joined: Sep 2003
Posts: 25,394
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So I took a chance and installed it anyway. The exterior electrical connection looked the same, but had small slits on different places than original. A pair of snips remedied the issue. I am reading two bars with a little over 4 gallons of gas total in the tank. So far I think it worked.
I thought it should've done the job - you apparently had the "desire".
