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A couple minor issues; Inaccurate gas gauge and a speedometer with missing tick.

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Old 04-22-2020, 04:59 PM
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A couple minor issues; Inaccurate gas gauge and a speedometer with missing tick.

I've been filling up every 250 miles on my trip meter, sooner if spirited driving + city miles. My gas gauge just isn't reliable, as I have almost a full tank.

As far as the speedometer, you can see im having an issue with the digital readout. It isn't consistent but more often than not, that top left tick is just missing. It's not impacting anything other than my chances of getting pulled over if I don't pay attention.

I plan on eventually upgrading the stock GT radio to either a tablet or maybe a pioneer head unit(open to suggestions) but I'm just trying to figure out the best place to start with all three of these since they'll very likely overlap in maintenance.

Old 04-22-2020, 05:05 PM
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The gauge is driven by the sender unit in the tank. If it's wrong I would start there.

The tick mark is more weird. Suspect the something has come unsoldered in the cluster, you'll need to take it all apart to see.
Old 04-22-2020, 07:03 PM
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Did you change the fuel pump recently? My gas gauge got twitchy after I changed my fuel pump.
It's been a while but I think I remember reading somewhere that it's possible for a wire on the pump to cause it, but I'm not sure.
Old 04-22-2020, 08:50 PM
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Originally Posted by Loki
The gauge is driven by the sender unit in the tank. If it's wrong I would start there.

The tick mark is more weird. Suspect the something has come unsoldered in the cluster, you'll need to take it all apart to see.
Ok I'll search and see if I can find more information regarding changing and checking the sender unit. The tick mark is definitely odd, I'd prefer not to mess with it if its just speculation, I imagine I'll have that area open anyways if I change stereo.

Originally Posted by BigCajun
Did you change the fuel pump recently? My gas gauge got twitchy after I changed my fuel pump.
It's been a while but I think I remember reading somewhere that it's possible for a wire on the pump to cause it, but I'm not sure.
No the fuel pump hasn't been changed anytime recently.
Old 04-22-2020, 11:21 PM
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After you fill the tank the gas gauge may not go to full quickly due damping they use to keep it from bouncing around over bumps, high G turns etc. It will eventually get there. If this is what you’re observing then you can just ignore it.

This car has s dual saddlebag style tank with two senders; one in each saddle. If one goes bad it will always read incorrectly. there’s a way to tell which one it is via the dash. I posted the procedure on here somewhere that allows you to access the actual output ohms on the dash for each one.

.

Last edited by TeamRX8; 04-22-2020 at 11:24 PM.
Old 04-22-2020, 11:29 PM
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Originally Posted by TeamRX8
After you fill the tank the gas gauge may not go to full quickly due damping they use to keep it from bouncing around over bumps, high G turns etc. It will eventually get there. If this is what you’re observing then you can just ignore it.
No not the same issue. It's just horribly inaccurate, all the time.
Old 04-23-2020, 12:09 AM
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ok, read the second half of my post then; a level sensor on one side must be bad or not connected/bad wiring.
Old 04-23-2020, 12:12 AM
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this was for the S1, not sure if S2 is different or not since I don’t mess with those too much

https://www.rx8club.com/series-i-tec...g-unit-160103/
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