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Old 07-13-2020, 09:46 AM
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Default Spectrum fuel tank sender

I used o new one of these for the 81. The 3/8 and 1/4 return lines stick up 1/4" more than factory and do hit the trunk had to use thicker rubber cushion to mount it. It also has pretty cheesy looking plastic for the resistor /float. An exposed very thin wire with thin insulation runs to the resistor portion and is easy to scrape the insulation off.

I have a new in box GM one but sitting in the box for 30 years it does not have any ohms .

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #2  
Old 07-13-2020, 01:15 PM
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Dens71TA Dens71TA is offline
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Quote:
Originally Posted by Skip Fix View Post
I have a new in box GM one but sitting in the box for 30 years it does not have any ohms .
Try submerging the resistor can into some gasoline. Sometimes that's all they need to start functioning again.

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Old 07-13-2020, 02:43 PM
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Forgot to also mention new aftermarket one is shorter and will sit almost 1" higher in the tank than a GM one so you could run out of gas easier even with fuel in the tank.

I'll give the gas a try.

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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #4  
Old 07-13-2020, 07:23 PM
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Take a soft new pencil eraser and lightly move it across the wound wire section, and take some 1000 grit (approx) and rub the under side the the arm that moves...

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1977 Black Trans Am 180 HP Auto, essentially base model T/A.
I'm the original owner, purchased May 7, 1977.

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Old 07-13-2020, 07:52 PM
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Hard to see inside the resistor part of the factory one you can see a flat piece of curved brass that slides inside.

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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #6  
Old 07-13-2020, 09:50 PM
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I have not had mine apart for a long time to remember....

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1977 Black Trans Am 180 HP Auto, essentially base model T/A.
I'm the original owner, purchased May 7, 1977.

Shut it off
Shut it off
Buddy, I just shut your Prius down...
  #7  
Old 07-19-2020, 07:24 PM
Poncho Dave Poncho Dave is offline
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Brass contact rubs against resistor. Sometimes new ones have a protective coating which blocks the pieces from making contact. Try using a solvent to clean first, then if that doesn’t work, you may need to get more aggressive.

  #8  
Old 07-20-2020, 09:34 AM
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Fine Lines vent line is close to factory, but all of their lines have a different hose crimp on it and the fuel return line. New fuel return old vent.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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