J Chen

Hi Guys,
What's the cause to this ? 1/4 it reads half tank full,
half thank it reads almost full. How can I resolve
this problem ?

Thank You

RMills944

Does the light work? Thats what I go by.
There was a thread on how to clean out the gas sending unit a few days ago and the guy said it wasn't hard. I think the thread was on the 968/944/924/951 forum though. Search there for it.

hosrom_951

J Chen: I believe you asked about this before right? it didn't help? As RMills944 mentioned, there was apost regarding cleaning the sender, if you don't find it here is a helpful link to clarks-garage regarding testing/cleaning and replacing the fuel level sender:http://www.clarks-garage.com/shop-manual/elect-13.htm

J Chen

Hi Hos,
I did that but it does'nt help

hosrom_951

Hi J Chen, what did you do? the proceedures listen in the link on my post above or what the 'older' post mentioned?

This is the 'older' post that i am talking about:

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/164529-flickering-fuel-gauge.html

Bill

It could be several things.


Gauge - Usually if the gauge fails you have no reading, but the face of the gauge is just a sticker and it can move/be ajdusted.
Wiring - bad connection at gauge or sender could give bad reading (excessive resistance), or wiring is shorting to ground.
Sender - a heavy float would give inacurate reading. Worn sweep contactor usually will cause the needle to intermittently drop. If the float arm gets bent, that will give erroneus readings.
Fuel Tank - If you put a large dent in the tank that displaces fuel, you will get inacurate readings.

Cyrus951

When mine was bad I cleaned the the ground under the dash, and cleaned the probes in the connector on the sender, and it's been working fine since.