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hi ya'll, once again i turn to this great site for help.
i'm working on a 1974 f100 360, c6, 9" rear.
i think i've found the oil pressure sending switch. i believe its on the oil filter spin on mount. is that correct? there is just a plug in it now and the aftermarket gauge is not hooked up nor is the factory one.
also, there is a canister mounted in the core support/passenger side fender area under the hood. there is a hard line that is attached to it and , i think to the fuel tank. what is the can and what does it do?
Correct. On the FE engines (360/390) the oil pressure sending unit is mounted on the oil filter adapter.
On the canister, I think you'll find it's attached to the frame rail. That's the charcoal canister for the fuel tank evaporative emissions control. There should be two lines to it. A 5/16" line goes to the fuel tank, a 3/4" line goes to the side of the air filter housing.
This sending unit is for a gauge, the unit for a warning light is smaller. Charcoal canister
ok thats great i thought that was the sending unit connection.
as for the canister, thats it! should that have any kind of service done to it, cleaning switching a filter etc? also, was that a cali smog feature? i know the truck was built at the san jose plant.
once again thanks for the help and info. this is a great forum!
glenn
No, no service is required on the charcoal canister. Not restricted to Cali smog. It was federal, but not required on all vehicles at the time so some will have it some not. It's function was to capture the vapor from the fuel tank, run it through the charcoal canister and then dump it into the air filter so it could get sucked into the engine and burned rather than just letting the vapor go out into the atmosphere.
BTW, welcome to FTE. Lots of good knowledgeable people here.
