I used to use up old gas from my outboard motor tank in my weed wacker. Once, the next time I went to use the weed wacker, I couldn't start it. It was seized solid. Turns out the gum in the old gas had glued the piston in the bore like epoxy and I had to take the engine apart and soak it in varnish remover to hammer out the piston. So, even if you clean out the tank and add fresh gas and get it running, make sure it's running on clean gas before you shut it down. As for changing the filter, I've had a spare for years, but after trying to loosen the old one and reading all about it here, that's a can of worms I don't want to tackle until the filter is actually well and truly plugged.
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1992 745, >500k km

And I'd add to the counsel you received on the fuel system -- ANY system with fluid in it needs to be investigated --- coolant, engine oil, trans/rearend fluid, power steering -- ESPECIALLY brakes. Condensation shows up everywhere when one sits. It's regular driving of one that allows that to boil off and minimize the harm done. About the worst thing that can happen to a car is to just let it sit. And 5 years is a long time of 'the worst thing'....
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82 242 5.0L; '10 Cayman S; '15 Honda Fit

If that gas was bad it's all bad!

I would lose the big filter, that's beside the main pump under the car!
This will also help clear the main pumps suction side of junk coming from the tank line. You pull the whole tray out as a unit to get at it.

Warning! The filter is a bear to get loosened and has to go back as tight not to leak. Use new copper gaskets and an impact if necessary.
Most likely, it may have been change once in the cars lifetime.

Out of sight, out of mind, rules are in play there!

Drained is an open statement of how?
Don't know if you dropped the tank and inspected it. I hope you did!
Did your tank have the screw in the bottom? I have seen some and that leaves trash let alone a clogged inlet sock!

Move to the FPR or at least the return hose there, going back to the tank. Blow air from there to the tank or best the other way around, if you can still access the Hose?
If not, the wee bit that goes back into the tank, will most likey be dissolved into several fresh gallons.


Next, bleed the fuel rail by jumping the pumps at the fuse panel. Run them until all is clear as some new baby oil in your catcher.

The whole jest of this, is to rid the system of as much of the old congealed fuel before it hits the injectors. Hopefully that's not too late!
If not you will be cleaning a screen or a pintle or two.

Seal it all back up and that should help cut down on many, many problems.

Best thing to do next is....Drive it more like you own it. It pays back dividends, in reliability!

Phil