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Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Thu Oct 06, 2016 9:22 pm
by yoda
Hello

Just drove my '73 911 down to Wales and the fuel gauge has had a melt down. First it started jumping up and down the gauge rapidly, while making an annoying clicking noise, and the readings were all over the place. Now I am home, the gauge is reading off the bottom of the scale and seems to be lost there.

Would ideally like to get the gauge working again as will be doing about 1000 miles this weekend and would prefer not to run out of petrol. Won't be able to take it into a specialist to have a look until after the trip.

Second best option would be if I could disable it so it stops making the annoying noise. Have some basic tools with me but not much.

Any suggestions or advice would be appreciated.

Thanks

Feroz

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Thu Oct 06, 2016 9:37 pm
by Ashley James
Funnily enough my 356 has been doing the same and I had the same trouble with a TR3A I had. On that it was the ground connection on the petrol tank sender.

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Thu Oct 06, 2016 11:14 pm
by hot66
Mine went mental , jumping up and down with the indicators etc ... It was the ground behind the dash on top of the bulkhead that had failed

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Thu Oct 06, 2016 11:34 pm
by yoda
Thanks guys, will take a look at the ground connections.

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Thu Oct 06, 2016 11:47 pm
by 210bhp
Fuel sender possibly or its connector. Pull the black plug off the sender on top of the tank, clean contact pins and refit.

Regards
Mike

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Fri Oct 07, 2016 12:24 am
by Mike Smith
Funnily enough my 356 has been doing the same
356`s always react this way but we can supply you with a damper unit - not expensive - easy to fit

Speak to Kevin at 07000 356 911

Re: Fuel gauge erratic - clicks, reading jumps rapidly

Posted: Fri Oct 07, 2016 9:21 am
by Ashley James
Mike Smith wrote:
Funnily enough my 356 has been doing the same
356`s always react this way but we can supply you with a damper unit - not expensive - easy to fit

Speak to Kevin at 07000 356 911
I'm not referring to the reaction to the float leaping about, but the flicking violently from end to end, which is rather more alarming.