1986 mr2 used up a full tank in 5 days

their were 3 engines for the gen 1 mr2 a 1.5 --1.6---1.6 supercharged
Toyota MR2 Wikipedia the free encyclopedia

The pump is in the fuel tank. To test short pin 1+2 on the air flow meter connector. Turn the ignition key to run position (2 click) and listen for the whir or hum of the pump.

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The relay should be in the engine compartment near the battery.

This i think is vacuum storage tanks that operate the flip headlight and cruise control and other vacuum controls. hope this helps.

I guarantee you, the water is not boiling in the reservoir. There is no heat source there, and even if it came out of the radiator boiling, by the time the coolant traveled down the hose to the tank, it would have lost too much heat to boil.

But if steam is coming out of your radiator into that tank, it would look like it was boiling.

It sounds like you have a radiator leak, and that you are therefore low on coolant, and the engine is overheating. With the car stone cold, open the radiator cap and top off the coolant as full as you possibly can, then replace the cap. While you have the cap in your hand, inspect the rubber gasket that seals it when it is installed. If that gasket is not in good shape, the normal operating pressure will force coolant into the radiator excessively, leaving not enough to cool the engine.

After a short drive that is sufficient to reach operating temperature plus about 5 or 10 minutes, and then allowing the car to fully cool, open the radiator to see if it is still full. It should have developed no substantial amount of space above the coolant surface, it should still be full.

If there is space, perhaps there was some vapor trapped somewhere, so try one more time. But if you are developing space in the radiator, you have a leak.

10.8 Gal.

Don't worry I'm sure you will get the solution of your problem, just check the link I attached
Toyota MR2 1983 1998 Workshop Service repair manual

Be sure that the fan is moving enough air across the radiator and be sure the radiator is clear of any debris. If it is and you're sure the system is full of coolant, have the radiator rodded out or replaced. This is most likely the issue. Hope this helps, good luck!

Check the bushings at the motor for the shift cables, worn or binding. The MR2 club has a link to a company who makes brass replacement bushings.