Fuel Reading Discrepancy

Fuel Reading Discrepancy

Author
Discussion

LeeHodges

Original Poster:

399 posts

283 months

Monday 4th July 2016
quotequote all
Hi

I jumped into the Tamora the other day to check how much fuel I had for the short 15 minute trip to Cars in the Park; flipping through the menus, it displayed 9 litres. That's enough, I thought so the next day I set off. I get half way when the car screams at me that there's only 4 litres in the tank. I start to get nervous. Having no time to fill up before I put the car on display, I decide to fill up on the way home. However, when I get back in later it tells me 2 litres. Given the length of the queue to get out I was already organizing my excuses to the watching public as "anther TVR breaks down...". However, when I looked through the menus again, I saw the same page listed the day before and it stated 8 litres. Is this typical that there can be two readings for fuel levels? scratchchin

LaserTam

2,108 posts

219 months

Monday 4th July 2016
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"they all do that sir" - mine certainly did. Never ever trusted it, always filled when it was down to 15L

LeeHodges

Original Poster:

399 posts

283 months

Monday 4th July 2016
quotequote all
I suspect as much; I'm no stranger to TVR fuel gauge anomalies as I've got a Griffith that has a rather 'binary' gauge. I was just confused that there seemed to be two simultaneous values for the fuel at any one time. Odd.

Bobhon

1,057 posts

179 months

Monday 4th July 2016
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I did an enthusiastic motorway joining bend in my Tamora. Before the bend I had 15 litres on board. Half way round the bend the 4 litres of fuel left warning came on.

A few miles after the bend it was back to 15 litres.

Nearly as bad as my S's, but the digital readout doesn't show the wild swings.

Bob

Bev400

23 posts

96 months

Monday 4th July 2016
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Yep, fuel gauge seems to be more of an estimate than an actual reading and i think that estimate changes based on how she feels that day :S

Bev

phoenixz

439 posts

166 months

Friday 8th July 2016
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I have noticed that the fuel count will go up when going uphill and down when going downhill. There is always about 5 seconds between each reading and is very rarely accurate.

I have filled up with the indicator saying 2L and then worked out that there must have actually been 8 litres left. For the most accurate readings it seems to be best to have the car on a slight uphill (very slight).

From experience there is generally about 10L left when the indicator beeps at you thinking there is only 4L.

How far this 10L will get you is very much dependent on how you are driving that day, but I normally fill up at this point anyway. On a convoy run I usually fill up at the same time as everyone else as they tend to need far sooner than I do, but it takes me a lot longer to fill up considering that you have to let the air out and can only hold the pump at half flow.