fuel gaege

Ok this is weird...

1993 silverado sportside 350 V8

This morning coming home from work the needle was one needle thickness
over the half mark with roughly 220km on the odometer.

Got in the truck a couple of hours ago and it is reading 3/4 tank of
gas and almost at 300 km and still over half a tank of gas left
according to the gauges.

Now when I first got the truck I would easily get between 300 and 350
by half tank but it's slowly been decrreasing in the past couple of
months and today it seems to be back to where it should be

Any ideas what would cause this?

Yes the needle does move in case anyome asks if it sticks as it went
from 3/4 tank to somewhere between half and 3/4 by the time I parked
it again and turning corners hard the needle does fluctuate on the
dash so it is working.

I'm thinking a build up in the line somewheres and finally let go?

"Michael McNeil" <michael_mcneil RemoveThis @hotmail.com> wrote in message
news:r1juq093gfnmjr57kr090kt7bmug3mcdoi@4ax.com...
 > Ok this is weird...
 >
 > 1993 silverado sportside 350 V8
 >
 > This morning coming home from work the needle was one needle thickness
 > over the half mark with roughly 220km on the odometer.
 >
 > Got in the truck a couple of hours ago and it is reading 3/4 tank of
 > gas and almost at 300 km and still over half a tank of gas left
 > according to the gauges.
 >
 > Now when I first got the truck I would easily get between 300 and 350
 > by half tank but it's slowly been decrreasing in the past couple of
 > months and today it seems to be back to where it should be
 >
 > Any ideas what would cause this?
 >
 > Yes the needle does move in case anyome asks if it sticks as it went
 > from 3/4 tank to somewhere between half and 3/4 by the time I parked
 > it again and turning corners hard the needle does fluctuate on the
 > dash so it is working.
 >
 > I'm thinking a build up in the line somewheres and finally let go?

I think using the gas gauge to meter fuel economy is a completely useless
practice. The gas gauges on these trucks are great for ballpark figures
"yes I need gas" or "no I don't need gas" but far too innaccurrate to be
used to measure fuel economy.

Try using your trip meter and litres per fill to determine fuel economy.
I'm sure you see that the gauge moving around like yours has does not
correlate to fuel economy.

Doc


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