Out of Gas

The CMC Vintage gauges take a specific (and suspect NLA) gauge sending unit.  You can't just substitiute a VW one for it and get a reading or an accurate reading.  The resistance has to match the original one.  Does it say VDO (hence a VW replacement) on top?  Have you pulled it to look at it? If it is the Vintage gauge one it could perhaps not be adjusted correctly or the arm stuck in up position.  Post picture.  You might get lucky and find someone with old Vintage gauge bits.

i found i never trusted my fuel gage as it always went to empty when i still had a third of a tank

THank you for the info on the gas guage issue. It looks like the sending unit is a vdo which explains the incompatibility with my cmc analog guage. It looks as though I may have better luck changing out my guage to a vdo to match the sending unit. Not likely able to find the old sending unit.

Thank for your reply

Renfrance

If I've read this post correctly, When the sender arm is up the guage reads way above full, and when the arm is down, the guage reads at the full mark....

If so, you might be able to insert a lump resistance in series with the guage....

I would measure the resistance of the sender and double it as a first shot.... ( adjustable wire wound resistors are good for this....   20 watt nominal power handling capacity.... )

If it aggravates the situation, then parralell the sender output with the resistor...

Depending on the typw of sender, might just be able to bend the float arm and make it read good...

I located the sending unit and it is a VDO vw replacement. Since the CMC guage as reported earlier may not read correctly. However, about an hour ago I noticed the fuel guage not turning on at all. I did nothing to change this. Any thoughts? Also any recommendations on what guage to buy to match the white round guages on the speedster and be compatible with the vw sending unit? Finally any idea on the ohm range on a vw sending unit?

Thank you

Renfrance

Does it have a good ground wire - to a clean ground (big problem on plastic cars)?

According to CIP1 site-

Resistance:
Empty = 80 Ohms
Full = 8 Ohms

VDO makes a white Cockpit series gauge that fits a 2 1/16" hole and works with that sending unit - I bet your Vintage gauges are 2 1/8 though. $28.

http://www2.cip1.com/searchresults.asp?cat=1974

Wolfgang:

Thank you for the reply. I am checking this morning for a ground issue. Also, will check the sending unit for the ohm readings. This sight has been a great help for a newbie like me. Thanks to all of you for providing a home to discuss what matters instead of politics!

Renfrance

Should also have mentioned that there is another white face VDO series called the Royale - I don't think they are currently made but they are still available.  They look better in and MGTD than a Speedster.

http://www.thesamba.com/vw/cla...etail.php?id=1350150

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