• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

Fuel Gauge Question

SimsBJ8

Member
Country flag
Offline
Fuel Gauge Question
Hopefully a simple question and answer, but I am totally bewildered. I have recently brought back to life my BJ8 after 25 years of sitting in the garage. One strange thing is that the Smiths fuel gauge fogs up shortly after I start the engine. It is clear when sitting, and clears up after turning the engine off. The gauge also is working and showing a representative level of fuel. The car has been in the garage for 25 years, so it should not have any water in it. I have not run the engine for more than 10 minutes straight or had it on the road for more than 4-5 miles so I do not know if it clears up after time.
Before I take the gauge out, open it up, and let it air dry, does anyone have a suggestion on what it may be?
Thanks in advance.
Bob
 

John Turney

Yoda
Silver
Country flag
Offline
First, many of the fuel gauges do this. Second, it will clear up after the car runs for a while and be clear for the rest of the day. It will likely fog up again when you restart it after sitting for a day or two.
 

BJ8Healeys

Jedi Warrior
Country flag
Offline
Not sure why it happens, but it is a common thing. My BJ8 does it sometimes, not always and has for the 36 years I've owned it. I once broke it by opening it up to try to clean the glass and dry it out and had to send it off for repair. It fogged up afterwards, same as always.
My best guess is that it has something to do with heating of the two coils inside the case and the ambient dew point but I don't know for sure.
 

steveg

Yoda
Gold
Country flag
Offline
Not sure why it happens, but it is a common thing. My BJ8 does it sometimes, not always and has for the 36 years I've owned it. I once broke it by opening it up to try to clean the glass and dry it out and had to send it off for repair. It fogged up afterwards, same as always.
My best guess is that it has something to do with heating of the two coils inside the case and the ambient dew point but I don't know for sure.

I believe they all fog like this. Mine certainly does. It's not a problem, it's a charming idiosyncracy.

The heating coil thing makes perfect sense.
 

mgtf328

Jedi Hopeful
Country flag
Offline
Sorry pressed the wrong key. I mean't to add that I bought a new one 3 months ago and was thinking of taking it out and sending it back. They're not easy to remove!
AJ
 

Keith_M

Jedi Knight
Silver
Country flag
Offline
Tom,
You should take the 5 at a time in an old Mercedes. Think of the fun you'd have!

If you're really going to do this (in the truck, I mean), I hope you're planning to stop in Utah!

Keith
 
Similar threads
Thread starter Title Forum Replies Date
C MGA Fuel gauge question MG 7
N Fuel gauge question?? Spridgets 3
Marvin Gruber MGA Negative grd- fuel gauge question MG 18
T TR2/3/3A TR3A fuel gauge question Triumph 36
Jim_Newman Another little electrical question - fuel gauge. Austin Healey 3
bighealeysource Fuel gauge question Austin Healey 3
G Fuel Gauge - Sending Unit Question Austin Healey 20
W fuel gauge question Triumph 7
Boink Early Mini Fuel Gauge - adjusting it British Motor Corp 0
S WANTED: Healey BN1 "Smiths" Fuel Gauge (Dead or Alive) Austin Healey Classifieds 3
R TR2/3/3A Fuel Gauge Triumph 19
T Wanted Smiths fuel gauge for Mk 1 Bugeye Sprite [FG2530/31] Spridgets Classified 1
S Fuel gauge calibration procedure Austin Healey 18
S Wanted 1959 Bugeye Fuel Gauge Austin Healey Classifieds 0
K TR4/4A Voltage Stabalizer and Fuel Gauge Readings Triumph 5
K TR2/3/3A Fuel gauge readings? Triumph 12
K TR4/4A TR4 Fuel Gauge'"light bulb socket" type? Triumph 11
B For Sale MGA JAeger Fuel Gauge, Dual Safety Gauge, Speedometer and Tachometer MG Classifieds 0
B For Sale Austin Healey 100 Smiths Fuel Gauge, Dual Safety Gauge, Speedometer and Tachometer Austin Healey Classifieds 0
B For Sale Triumph Tr3 Fuel gauge Temp gauge Oil pressure gauge, speedometer tachometer Triumph Classifieds 0
K TR2/3/3A Re TR4 and TR3 fuel gauge sending units again.... Triumph 0
K TR2/3/3A Can a TR4A Fuel Gauge be swapped into a TR3A? Triumph 8
K TR2/3/3A Fuel Gauge again.... Triumph 11
N Fuel gauge problems? Spridgets 9
warwick-steve Fuel Gauge always shows 1/4 full Austin Healey 27
N Fuel gauge problem's? Spridgets 4
D Wanted TR3A Fuel gauge Triumph Classifieds 4
T TR2/3/3A Why is voltage stabilizer not needed for TR3 fuel gauge? Triumph 4
Tim Hollister Wanted Need Fuel Gauge for 1959 Bugeye Spridgets Classified 2
Lutz Kramer Fuel gauge and sender unit for BJ8 Austin Healey 2
George Zeck Looking for a fuel gauge ...... Spridgets 2
K For Sale TR3 Fuel Gauge Triumph Classifieds 8
warwick-steve Fuel Gauge always indicates 1/4 full. Austin Healey 13
J Fuel sender, fuel gauge 100 4 Austin Healey 6
George Zeck What fuel gauge SHOULD I have? Spridgets 3
sim 1958 fuel gauge sprite Spridgets 11
N Spitfire Fuel gauge Triumph 8
Martinld123 Austin Healey 100 BN2 fuel gauge not working Austin Healey 13
B TR2/3/3A Fuel gauge problem Triumph 7
H TR2/3/3A Fuel sender or gauge? Triumph 8
F Running out of fuel - gauge problem? Austin Healey 5
K TR2/3/3A TR6 fuel gauge in a TR3? Triumph 1
K TR2/3/3A Fuel gauge and switching to Neg ground? Triumph 2
K TR2/3/3A Can a TR4A fuel gauge be used in a 3A? Triumph 8
toysrrus TR2/3/3A How to test fuel gauge & sending unit? Triumph 10
Rut Bugeye fuel gauge Spridgets 14
Editor_Reid Fuel Gauge for 1967 Sprite Spridgets 4
M TR4/4A Temperature and Fuel Gauge Wiring...Help Wanted Please Triumph 6
C TR6 Fuel gauge mystery Triumph 6
A Fuel Gauge - Help Needed Austin Healey 18

Similar threads

Top