Fuel Gauge Problem

[jwc11170]

My fuel gauge will not move all the way to full. This gauge has been in this condition since purchasing the Z. Where should I start to diagnose the problem?

[barth4567]

It could be the Gauge itself or more likely the sender unit in the tank also. The sending units are still available OEM and I would start there. A whole lot easier than replacing a Gauge.:classic: My opinion only. John

Edited January 16, 2010 by barth4567

[mlaw7]

It could be the Gauge itself or more likely the sender unit in the tank also. The sending units are still available OEM and I would start there. A whole lot easier than replacing a Gauge.:classic: My opinion only. John

I just went through this exact issue on my '78.

It just may be the gauge. Does your ampmeter seem to work correctly?

I was looking at replacing the fuel sending unit as I hear they do go bad and since good working voltmeter (or ampmeter depending on the model)/fuel gauges seem to be hard to come by these days. So I just put my dash back in with the old gauge and figured I'd have to live with it.

I have noticed that the voltmeter did not seem to working correctly for some time. Then after putting the dash back in, I found a properly working voltmeter/fuel gauge.

The good news is that I was able to swap it out easily. It's nowhere near as hard to do as I thought it would be. Even better, the fuel gauge now moves all the way to full and the voltmeter reads correctly! The whole job took a little under 30 minutes.

So, I would question whether swapping the fuel sending unit is either easier or cheaper than replacing the gauge.