I have a 94 740 non turbo and the fuel guage is always on empty, any ideas what i can do to fix this?

Thanks

 

Sorry its a 94 940 not 740

 

no one has any idea what it could be?

 

could be the float thats in the gas tank sending unit. The wiring from the instrument cluster check that first.

 

Ok ill try that, do you know how to get to the sending unit? do i have to drop the fuel tank? Or is there an access pannel? Thanks!

 

I know on my 90 740 turbo you can access the module in the trunk

 

Kind of crude, but you can smack on the top of the dashboard when everything is on and the gauge is reading low, and if the gauge starts working, then you know it's either the gauge/wiring/printed circuit board.

Otherwise you're looking at a sending unit. Kind of a pain on these cars, but you don't have to drop the tank. There is a 10" X 10" black cover in the trunk behind the back seat, under the carpeting.

Good Luck

B

 

i hit the dash today and the guage started to work untill i shut it off now i got nothing, even if i beat the dash! ha

 

Did the gauge instantly start registering?

If so, it sounds like it's the gauge, wiring connector to the instrument cluster, or the "wiring plate", which is likle a printed circuit board.

Sounds like it's pretty consistent, if you pull the instrument cluster and leave it connected, you may be able to wiggle the connector and see if the connection is poor, or check voltage reading at the gauge to determine the faulty part.

I've had to diagnose at least 5 of these or so, and sometimes it all starts working when you take it apart, so it can be tough to diagnose. Hope you find the problem.

B

 

How do i go about pulling the cluster out?