Fuel Gauge sender?
Discussion
Usual TVR idiosyncrasy...
Took the car out for a run earlier and the fuel gauge was behaving perfectly as it always has. Stopped at a mates for a catchup, get back in the car and the fuel gauge reads about half of what it was earlier.
Nip to the nearest She'll garage and brim the tank and the gauge hovers between half and 3/4.
My thinking is the fuel gauge sender playing silly bu**ers?
Gauge has always been fine up to now. Car is a '99 model.
Any pointers greatly appreciated.
Thanks
Took the car out for a run earlier and the fuel gauge was behaving perfectly as it always has. Stopped at a mates for a catchup, get back in the car and the fuel gauge reads about half of what it was earlier.
Nip to the nearest She'll garage and brim the tank and the gauge hovers between half and 3/4.
My thinking is the fuel gauge sender playing silly bu**ers?
Gauge has always been fine up to now. Car is a '99 model.
Any pointers greatly appreciated.
Thanks
....My gut feel on this is that - somewhere - you have a poor/corroded connection.
My basis for the assumption is that the level gauge works on measuring a variable resistance. Therefore, if, because the car has been laid up over winter, connections have gone a bit scabby, you are introducing another 'resistive' component into the measuring circuitry....And, it could be intermittent.
I'd start at the plugs/connections to the sender on the tank itself, then work your way along the wiring (noting colours and tracers) to the front of the car. IIRC there are several multi-pin plugs behind the B-post carpeted panel passenger side (and I think drivers side too). These are known problem areas for poor connections to electrical components at the rear of the car.
Nick
My basis for the assumption is that the level gauge works on measuring a variable resistance. Therefore, if, because the car has been laid up over winter, connections have gone a bit scabby, you are introducing another 'resistive' component into the measuring circuitry....And, it could be intermittent.
I'd start at the plugs/connections to the sender on the tank itself, then work your way along the wiring (noting colours and tracers) to the front of the car. IIRC there are several multi-pin plugs behind the B-post carpeted panel passenger side (and I think drivers side too). These are known problem areas for poor connections to electrical components at the rear of the car.
Nick
That sounds like the solution, I agree.
However, if that fails to sort it, basically the fuel level detection is done by a float on a pivoting arm.
The electronics in the sender then damp out the bouncing and send a smooth signal as described above. It might just be worth whipping the entire sender out and checking it is moving freely. IIRC it was easier reinstalling it with two of us, one to do the job and one to pass screws etc.
However, if that fails to sort it, basically the fuel level detection is done by a float on a pivoting arm.
The electronics in the sender then damp out the bouncing and send a smooth signal as described above. It might just be worth whipping the entire sender out and checking it is moving freely. IIRC it was easier reinstalling it with two of us, one to do the job and one to pass screws etc.
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