Question about 1993 Saab 900

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The full empty needle is stocked at the empty position in my 1992 saab 900

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On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); gauge not working.
Test the resistance with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

Posted on Jul 01, 2009

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You Probably need a new fuel pump(comes with fuel sending unit). But you'll want to proof it out before you start buying expensive parts. If you access the fuel pump, remove it and inspect it. You will narrow it down. The float could have fallen off or failed, the sending unit could be damaged (use a multimeter to test), or the wiring or plug to the sending unit could be corroded or broken.

Posted on Jun 18, 2009

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get the appropriate manual for your car and enjoy the Saab!

Has info on just about every thing, including shifter. You didn't say whether yours is manual or auto. You could source a used shifter from your local Saab specialist or local junk yard, though there aren't too many Saabs at the wreckers; a good sign!

Saabreur

Apr 12, 2009 | 1992 Saab 900

1 Answer

1989 Saab 900 low level fuel light


You don;t say whether the fuel gauge is reading accurately, or whether it's always on empty. If the gauge is always showing empty, it's most likely a problem with the sending unit in the fuel tank. Check the resistance across the two terminals of the sending unit.

On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); or gauge not working.

Test the resistance of the sending unit with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

If the gauge is otherwise reading accurately (showing 'full' for a full tank, etc) then the problem is likely a gauge malfunction and can be simply replaced.

Good luck!

Saabreur

Jul 10, 2008 | 1989 Saab 900 4 Door

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