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Diagram for fuel level indication Q4?

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Diagram for fuel level indication Q4?

Postby Integrale evo » Sun Jan 22, 2017 5:01 pm

Search for Q4 diagram for fuel indicator. The indicator show empty tank all the time
Integrale evo
 
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Re: Diagram for fuel level indication Q4?

Postby Alfan » Mon Jan 23, 2017 9:03 pm

It looks like the instrument part containing this info is defective...

Anyway, you have 2 senders and most likely the carbon track they are moving against is worn out, not giving a signal. I would think that you should be able to measure a different resistance, corresponding to the position.

In mine it is rarely showing correctly, either it has an offset, showing level to be lower than it is, but right now it is showing a full tank, even when I can put 55L in it...

There was a post on alfabb.com recently, where I added some photos, have a look here:
http://www.alfabb.com/bb/forums/164-168 ... light.html
1994 Alfa Romeo 164 Q4 Proteo Rosso 535.000km
1989 Lancia Thema 8.32 Verde Indy 260.000km
2015 Alfa Romeo 4C Rosso Competizione 75.000km
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Alfan
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Re: Diagram for fuel level indication Q4?

Postby augusto drigo » Wed Jan 25, 2017 12:57 pm

Good afternoon my friend

I had the same problem on my 164 q4, until I discovered that there are 3 buoys ... and 2 of them had the unplugged wire .... make sure it can not be the same problem ...

A good luck to you
Alfa Romeo 164 Q4 - 56.000 km
Alfa Romeo 155 2.0 T.S DTM MARTINI - 86.000 km
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Re: Diagram for fuel level indication Q4?

Postby Integrale evo » Sat Jan 28, 2017 9:52 am

I have taken out all 3 sensor and all is function, they are connected in serie, There for i need diagram to find were they END up into the display.
Integrale evo
 
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Re: Diagram for fuel level indication Q4?

Postby Alfan » Sat Jan 28, 2017 10:47 am

1994 Alfa Romeo 164 Q4 Proteo Rosso 535.000km
1989 Lancia Thema 8.32 Verde Indy 260.000km
2015 Alfa Romeo 4C Rosso Competizione 75.000km
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Alfan
Q4 owner
 
Posts: 1023
Joined: Thu Oct 22, 2009 8:20 pm
Location: Denmark
Country: Denmark (dk)

Re: Diagram for fuel level indication Q4?

Postby Integrale evo » Sun Jan 29, 2017 10:03 am

Thank you both for all help, this diagram will help :P

Yes, then the level indication for fuel is back in operation, measure around 106 ohm on the circuit when 1/4 full tank.
Integrale evo
 
Posts: 91
Joined: Sat Sep 18, 2010 6:08 am


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