What Level Does your Fuel Guage Read

[carlmthompson]

Hi all,

I'm hoping some of you big milers will be able to help.

I've only filled the car twice since I got it, but on both occasions, the petrol guage didn't show full - it showed between 3/4 and Full.

I filled the tank when the guage was showing between 1/4 and R, but it only took 58 litres.

As the tank hold 80 litres, I'm wondering if I have a fuel sender problem, or a dodgy guage. Does anybody else have this problem, or do they all do that!

 

[Mark_Bennett]

I have a funny feeling my old 944 used to do that...

 

[hartge bob]

Mine has always only ever shown 3/4 full, even when it's been filled to the brim.

I think there's a procedure somewhere to check the sender, probably on http://www.clarks-garage.com/

 

[Guest]

Yes mine does that, its not the sender it the actual gauge that the problem. I read somewhere that taking the instruments out and giving the terminals a clean greatly helps. Other solution is to take the needle off and move it round.

Its one of those jobs that seems to keep getting put back on the long list right now!!

 

[chrisr]

My needle does show to the brim and I fill her up when the light first starts to flicker and it takes about 64 litres and thats its lot, and 300 miles later it all starts again.

 

[lali]

Mine shows between 3/4 and full as well... But since the old M5 used to show whatever it felt like no matter how much fuel was in the tank Im looking at this as an improvement!

300 miles?... hmm.... I think i need to make less use of the loud peddle

 

[Guest]

Ditto. Full, reads three quarters. Needle on red (light not illuminated) get another sixty miles.
I have recently found that there seems to be some connection between the right foot and fuel consumption.
Example. A known trip of 270 miles in this (944s2) and previous cars 2.5V6 and 2.0turbo, the car would be driving on vapours arriving the point of destination. Since getting a speeding ticket and seeing the errors of my ways I now get 360 miles to a tank.
I now apply Zen. See my next thread.

 

[Diver944]

Most 944 tanks only read 3/4 full, even when you gently fill them to the brim so it flows out the overflow pipe [], it's an age thing and can be rectified as above.

The capacity of S2 and Turbos is 80 litres and the fuel warning light will come on when 8 litres is left.

If you've just bought a new car then I'd recommend you test your low fuel light with a spare can in the boot (just in case). My gauge did improve when I started using Optimax and once left the car totally full for a couple of days. I can only imagine the cleaning chemicals cleaned the sensor slightly [&:]

 

[Guest]

Same thing here. Reads between 3/4 and full.

ORIGINAL: Diver944
My gauge did improve when I started using Optimax and once left the car totally full for a couple of days. I can only imagine the cleaning chemicals cleaned the sensor slightly [&:]

Could be an unforseen benefit of using the good stuff []

 

[Guest]

There's an article about this on the 928 forum. It is happens to us as well. It's due to corrosion on the pins at the back connection of the guage that increase the resistance in the connector and therefor decrease the deflection in the guage,

Rich
Manual 928 S4

 

[carlmthompson]

Anybody ever tried to take the guages out before?

I had a look at the Porsche Manual, but it looked like a bit of a fart on.

As an aside, I fixed my non-cancelling indicators today - a doddle to take the stalks out and replace them.

Strangely though, I replaced the ones that were on (with a part number starting 928, and an extra bracket for what I think must be the cruise control), for some earlier ones (with part number starting 944). This would have been okay (mine hasn't got cruise), apart from the stalks on the knackered unit were actually longer! As some of the paint had scratched off the replacement items anyway, I decided to swap the stalks around - so now I have an older column switch unit with newer stalks!

Oh and working cancel on my indicators.

Sounded like a big job, but only took an hour!!

All i need to do now is take the steering wheel back off and put it back on straight [] (or use it as an excuse to buy a new wheel!! I'll tell the wife that that ones bent[][].

 

[Diver944]

ORIGINAL: carlmthompson

use it as an excuse to buy a new wheel!! I'll tell the wife that that ones bent[][].

I like your style Carl, we won't tell a soul [:-] I'm thinking of using the same method to replace my air flow meter with a new MAP kit []

The gauge pod comes out really easily. It's just a case of taking off the wheel, undoing a few screws and taking off three ribbon connectors. I did it this year when replacing my dashboard. Look at the instructions for Dash removal at www.clarks-garage.com . I don't know how accessible the fuel connections are as I didnt look [&:]

 

[Fen]

A fuel gauge, yesterday. (Actually a few months ago):

Did I mention that the car that's attached to is for sale? 190,000 miles and the only working fuel gauge on the forum []

It's easy to get the instruments out - I've done it enough until I finally cracked why one of my dash lights wouldn't stay on. The terminals for the fuel gauge will be accessible when the cluster is out I think.

 

[sawood12]

For what it's worth mine is the same as alot here - it shows somewhere between 3/4 and full when I fill it to the click point of the pump. However I've found the gauge seems to be very senitive to gradient, it can vary as much as 1/4 of a tank on the guage, so have been assuming i've never been on truly flat ground with a full tank!

I will then get between 300 to 350 miles before my usual fill point (just above the red) and it will then take between 60 to 65 ltrs to fill so by my reckoning the red part of the gauge is worth about 20 ltrs.

Sounds like I'm a bit more conservative on the right foot than some here which surprises me!