Headlights only work on High Beam - is it a fuse?

Pretaco · 01-18-2008, 03:49 PM

I didn't think that trick worked on toyotas, but maybe on turbo supras due to the style of maf.
Most toyotas don't start the fuel pump until the key is turned to start, then when the engine is running the maf has a switch that controls the fuel pump, so if the engine dies, the fuel pump does too.
But the supra turbo has a different style of maf, one that doesn't allow for the mechanical fuel pump switch, so it could have a different fuel pump control circuit.
The natural aspired engines still have the older style maf and so they probably work in the typical toyota way, whereas the fuel pump only works at "start" or when the engine is running.

01-18-2008, 03:49 PM	#8
Pretaco 3" Exhaust Join Date: Dec 2007 Location: Glendale, AZ Posts: 126	I didn't think that trick worked on toyotas, but maybe on turbo supras due to the style of maf. Most toyotas don't start the fuel pump until the key is turned to start, then when the engine is running the maf has a switch that controls the fuel pump, so if the engine dies, the fuel pump does too. But the supra turbo has a different style of maf, one that doesn't allow for the mechanical fuel pump switch, so it could have a different fuel pump control circuit. The natural aspired engines still have the older style maf and so they probably work in the typical toyota way, whereas the fuel pump only works at "start" or when the engine is running. __________________ '88 Supra Targa 5 speed w/ '90 7M-GTE Currently Running Good For Sale: Light blue body parts, Blue interior parts all from '90 supra targa turbo manual. Also for sale: R154 trans, brake pedal, master cylinder, booster, abs actuator, sensors, abs ecu, driveshaft, 3.90 lsd rear end, radiator, wiring, speedo cable, 8 saw blade wheels, '88 ecu, relays, cruise control actuator (bad cable), empty fuel tank, etc....