Working on a 77 fj40 the fuel gauge works intermittently. It reads the correct amount of fuel sometimes and other times does not, even if I don't move the the truck. Seems to be a hard one to pinpoint what is going on any help would be great. Thanks!
fuel gauge issue (2 Viewers)
- Thread starter tony58
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- fuel fuel gauge gauge issue
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Green Bean
GOLD Star
Just guessing here that it might be a weak ground wire connection: I'd start at the tank and work back towards the instrument cluster. Lift up the passenger seat to gain access to the top of the tank; remove wires and thoroughly clean contacts. Test for continuity. If that does not solve the issue, do the same at the other end.
add a dedicated polarized ground wire to 1 of your top Philips head screws sender
- u have a OLD sender , BAD
buy this one
new oem gasket
ALL NEW OEM screws
both of these approaches WILL 99% solve your issue
DO NOT do only 1 , you will fail and this will not be good ...
- if you cheat , and only do one , we will know ,
- i will be back to see your OEM parts progress
good luck , you can do this ...
- adding the ring terminal ground to a new OEM sender is your path
NO AMAZAON or ROCK AUTO parts here either chinA s#IT crap .....BAD
OEM Fuel Tank Sending Unit Gasket for Land Cruiser FJ40 FJ45 FJ60
Fuel tank sending unit gasket for Toyota Land Cruiser 40 and 60 Series.
www.cityracerllc.com
Fuel Tank Sending Unit Screw Kit for Land Cruiser FJ40 FJ45 FJ55 FJ60
Set of 5 fuel tank sending unit screws and washers for Toyota Land Cruiser 40, 55 and 60 Series. Choose either OEM or stainless upgrade. Both are JIS (Japanese Industry Standard) metric small head screws.
www.cityracerllc.com
OEM Fuel Tank Sending Unit for '73 to '78 Land Cruiser FJ40 FJ45
OEM fuel tank sending unit for '73 to '78 Land Cruiser 40 Series. Compatible with 2F, F, and B engines. Gasket and screws are available separately.
www.cityracerllc.com
this is the way ...........
OEM Fuel Tank Sending Unit for '73 to '78 Land Cruiser FJ40 FJ45
OEM fuel tank sending unit for '73 to '78 Land Cruiser 40 Series. Compatible with 2F, F, and B engines. Gasket and screws are available separately.
www.cityracerllc.com
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To add to Green Bean's comment, it's more often than not the ground at the chassis end that acts up. Bit of a pain to get to but once clean you should have a consistent reading.
- Thread starter
- #6
I checked the continuity from the sending unit wire to the plug at the gauge all good there. I grounded the wire on top of the sending unit and connected that to the negative side of the battery still no good, does the instrument panel need to be grounded, have that pulled out but even when it was still in it did the same thing. Thanks again!
Mine reads full for a long time, 1/2 is about right and E is you are walking - Odometer is my best fuel range gauge. However, low range low in mud up to the hubs for about 10 miles on the tank trails really sucks gas.
Green Bean
GOLD Star
Green Bean
GOLD Star
Sorry about that. Try this:
Fuel Tank/Sending Unit for March 1971 FJ40
I am trying to get my sending unit to function properly and I ran into trouble. My original gas tank was leaking way back in the 1990's and, through a series of long-winded events, my dad took the lead on a replacement and came up with what I think is a later model year tank. From what I...
forum.ih8mud.com
Well if you've grounded the wire at the sender, and you're not registering it at the gauge, then it can't be a sender fault, can it?
Most likely your voltage regulator on the gauge is shot.
What is the voltage at the 3rd terminal on your gauge? Should be about 7V.
