Hello List:
These facts I know to be true: Visually and according to the gauge, there
was just under 1/4 tank of gas in the tank. The filter is not clogged. The
gas tank was rebuilt two years ago and it is not believed to be clogged.
Recently, my engine began sputtering and surging as if running out of gas,
then sputtering and finally dying. I pulled to the side of the road for a a
couple of minutes. I noticed the fuel filter was empty. When I levered the
primer on the fuel pump, it didn't feel as if there was any suction and no
gas was making it to the filter. After a few minutes, gas appeared in the
filter and the car started and ran for a while before again sputtering to a
halt. Believing that it might be a venting problem, I flipped open the gas
tank cap and thereafter, noticed fuel filling in the filter. The car drove
normally for a few miles and then sputtered again. I topped off the gas tank
and then drove 40 miles without another sputter.
There is a vent hose that runs from the top of the gas tank (on a '75)
through a canister/seperator and then to the engine compartment and into the
carbon canister. Running low pressure air into the canister revealed no
restrictions. Trying to run air from the carbon canister side of the vent
line back to the gas tank met with restriction.
Questions:
Does the canister/separator at the gas tank only vent in one direction,
i.e., toward the carbon canister in the front? If so, that would explain why
there was resistance to the air pressure I was blowing from the carbon
canister. If the canister/separator is not a one way vent, then it appears
to be clogged. This part is NLA, but does anyone know of a similar
replacement? Any other ideas?
Many thanks,
Bob Fabie
'75 TR6
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