I've recently purchased my first "brick" and it will only hold about six (6) gallons of fuel.I assume it has a Volvo tank since, there it is.Naturally the fuel gauge doesn't work so i've taken to carrying an empty gas can which I have needed.Anyone heard of such a thing? Thanx in advance!

Do you know that it only holds 6 gallons or does ir "run out of gas" then only take 6 gallons to fill it.

Problems with the pick-up in the fuel tank cause the fuel flow to stop before the tank is empty. This usually starts at 1/8 of a tank, then 1/4, then worse and worse. I think that I read that a tube splits and then gets worse as time goes by.

A non-working fuel gauge is often a result of a bad solder connection in the dash. Try snapping the instrument panel with your finger right where the gauge is. This always gets our gauge working. It happens to the temp gauge also.

Do a search and look at the 700/900 FAQ - these issues are discussed often.
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'96 855R, '95 855, 854, '90 744 TI, 366,000 miles put on 7 bricks

Have you crawled underneath and see if it looks original?

How did you determine the 6 gal. figure? Did you run out and then refill?

My guess is something broken in the pickup line possibly the rubber hose that connects to the tank pump?

I believe my '87 hold 15.8 gals.