Fuel Gauge live at al times?

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sanramonrover
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Location: Canada & Costa Rica
Isuzu vehicle(s): 1991 KB (AKA TFS) 4X4 with 4JB1 Diesel

Fuel Gauge live at al times?

Postby sanramonrover » Sun Dec 11, 2016 1:09 pm

I don't drive my '91 Isuzu KB pickup for months at a time and sometimes forget what is where. This time I notice that the fuel gauge needle stays at the fuel level even when the ignition is switched off. And I forget if that is normal or not :oops:

Should the fuel gauge needle drop to the bottom of the gauge like all other gauges when the ignition is switched off?

Please refresh my memory :?
1991 KB 4X4
1988 VW Westfalia
1975 Triumph Spitfire

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sanramonrover
Regular Member
Posts: 127
Joined: Fri Oct 11, 2013 11:58 am
Location: Canada & Costa Rica
Isuzu vehicle(s): 1991 KB (AKA TFS) 4X4 with 4JB1 Diesel

Re: Fuel Gauge live at al times?

Postby sanramonrover » Tue Dec 20, 2016 8:45 pm

Has no one noticed whether their gas gauge needle drops to zero when the key is switched off? And rises to the current fuel level when the key is turned back on? Or stays at the actual fuel level with or without ignition ON?
1991 KB 4X4
1988 VW Westfalia
1975 Triumph Spitfire

robgt22
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Joined: Sat May 30, 2015 2:30 pm
Location: Guatemala
Isuzu vehicle(s): honda passport 95 with isuzu c223 diesel engine

Re: Fuel Gauge live at al times?

Postby robgt22 » Tue Dec 20, 2016 9:26 pm

sanramonrover wrote:Has no one noticed whether their gas gauge needle drops to zero when the key is switched off? And rises to the current fuel level when the key is turned back on? Or stays at the actual fuel level with or without ignition ON?


Which cluster do you have? Just speedo, fuel and temp or the full one?
Honda passport/Isuzu rodeo 95 with a c223 in it. Running 15 psi of boost with a Garrett gt1749. Straighpiped and intercooled.

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sanramonrover
Regular Member
Posts: 127
Joined: Fri Oct 11, 2013 11:58 am
Location: Canada & Costa Rica
Isuzu vehicle(s): 1991 KB (AKA TFS) 4X4 with 4JB1 Diesel

Re: Fuel Gauge live at al times?

Postby sanramonrover » Wed Dec 21, 2016 7:30 pm

Hi robgt22, I put a Rodeo cluster (about '94) with tach and speedo plus the 4 gauges. I assume I wired it up correctly when I replaced the simpler speedo and 2 gauge unit.
1991 KB 4X4
1988 VW Westfalia
1975 Triumph Spitfire

robgt22
Regular Member
Posts: 362
Joined: Sat May 30, 2015 2:30 pm
Location: Guatemala
Isuzu vehicle(s): honda passport 95 with isuzu c223 diesel engine

Re: Fuel Gauge live at al times?

Postby robgt22 » Sun Dec 25, 2016 2:12 am

sanramonrover wrote:Hi robgt22, I put a Rodeo cluster (about '94) with tach and speedo plus the 4 gauges. I assume I wired it up correctly when I replaced the simpler speedo and 2 gauge unit.


Well as far as I remember hose clusters keep the fuel gauge live, even with the battery unplugged, don't know why, I've seen some clusters just work like that, maybe it's to protect electric fuel pumps in case you got low fuel, as a reminder before you turn ignition on. :roll:
Honda passport/Isuzu rodeo 95 with a c223 in it. Running 15 psi of boost with a Garrett gt1749. Straighpiped and intercooled.


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