Baka namali ang firing order. Happened to my ST191 before. Nabiligtad ng mekaniko yung pin ng distributor.
To test, bukas ng valve cover, itapat yung crankshaft pulley notch sa zero, ensure that no.1 cylinder is at compression TDC by ensuring that the pointed part of both its intake and exhaust camlobes ay nasa horizontal position or hindi nakaturo sa ilalim. At this position, yung distributor rotor e dapat nakaturo sa HTW ng no. 1 cylinder.
Or try to test kung may voltage sa terminals ng fuel injectors. Troubleshooting a Toyota Fuel Injector | eHow