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Fuelindication

Posted: Sat Jan 15, 2011 9:08 am
by grandpa
Hi
On my 1978 GW I have something going on with the fuelindicator. When I top up the fueltank the instrument showes full. When I start driving the instrument rather quick goes down to reserve. But When I top up the tank again I can only put about 2 gall/8-10 liter.

Does someone out there know about what to do or doe's someone have the ohms for the fuelsystem so I can simulate feks. empty - half full - full tank. :?:

I have empty the tank via "main" supply and when I turned the handle to Reserve nothing happend. I can se there is still fuel in the tank. I would like to remove the fuel tap but is it posible without damage the gaskit and do I have to be carefull in a special way.

I can tell that fuel does NOT taste well. :mrgreen:

Grandpa.

Re: Fuelindication

Posted: Sat Jan 15, 2011 10:51 pm
by WingAdmin
A quick question - is your temperature gauge also misbehaving?

Re: Fuelindication

Posted: Sun Jan 16, 2011 4:12 am
by grandpa
Hi
I know what you are thinking about. The 7 volt regulator.
The temp indicator is under normal operation in the lover end of the scal but if I park the bike and let the engine on, the temp indication will rise to about 3/4 and then fall a little back again which I think is normal when the fan turns on.

But I will of course check the 7 volt regulator.

And in the manual I have the ohms figure for the tempindicator so I will check that out as well.

Any ideas why I cant get the reservefuel out of the tap.

Have a nice weekend, and happy birthday, just a little late.

Grandpa.

Re: Fuelindication

Posted: Sun Jan 16, 2011 8:14 am
by grandpa
Hi again.
I found the 7 volt regulator. It was placed and screwed to the botton of the temp and fuel indicator. I checked it and the result was 7.10 volt which should be okay.
But at the same time I checked the 12 volt supply and that was only 10,8 volt and checkin the battery I had 12,4 volt.

This tells me that the regulator is OK but there is heavy resistens( lose connection, bad connection etc.) which can create a voltages drop of almost 2 volt with that little drawn power. But that is an other challenged. Maybe also why I got the bike cheap. But I new there was some electrical problems when I bought it.

Brgds Grandpa :D

Re: Fuelindication

Posted: Mon Jan 17, 2011 9:20 am
by dingdong
One of the biggest problems and the most over looked problem with the old Wings is loose and corroded electrical connectors. Might as well get started cleaning and tightening.

Re: Fuelindication

Posted: Mon Jan 17, 2011 10:14 am
by WingAdmin
Your temperature gauge sounds like it is operating normally. I'd have a look at the fuel sender.

For the 1978 GL1000, the sensor should read 70-90 ohms when the tank is empty, and 3-10 ohms when the tank is full.

Re: Fuelindication

Posted: Tue Jan 18, 2011 7:44 am
by grandpa
Hi.

I just checked the fuelsender. Full 7 ohm and empty 83 ohm. Sounds ok. I also checked if there is some break in between but no failure. I connectet the sender to the system and checked the indicator. It seem to work ok. But at the same time I have found very poor connection. So now I puy all together an see what happend.

Dingdong, you are shure right. I have found a lot of not only poor but very poor connection. Mostly spade connection.

During this operation I also foundout that voltageregulator is removed. The connectors where wrapped in tape, so now I have to figure out how the voltage is regulatede. And there is instaled a rectifiren which is not original.
It is an E20263 SCHNABEL, 12V 3phase, Regulator/Rectifire. There are 3 yellow to the stator and Black(ground) Red( Plus)
I can't find anything on the net about it so anny information will be helpfull. :?: