ser - In know what you are referring to, If anyone recalls there is only one correct working 4AGZE corolla in Karachi. That car was brought to me dead and said - please do anything to make it work - It did work for about 2 months then just died, injectors flooding etc.
After taking out the entire cut/tape loom I saw no injector resistors for it. No wonder the ECU died - you cannot make an ECU trip 10 amps per pulse of injector. I just added a couple of 5 ohm 50W golden ones to the new wiring loom I made, repaired the ECU - and it was good after that.
Tying one injector lead to fire 4 injectors was in the old school toyota engines and also the charade GTti ECU (batch fire system) - take into consideration
now the 4AGE 20V uses nearly 12.5 ohm injectors = roughly 1.12 amp per injector driver circuit
4x12.5 ohm injectors = 3.125 ohms which is 4.48 amps on that one injector circuit (FAIL)
e.g. the 4AGZE uses 2.4 ohm injectors with inline resistors paired like the 4AFE - that means every injector circuit should be 2.24 amps (toyota standard)
no this weirdo who wired it up did not know anything - 2.4 ohm per injector multplied by 2 = 1.2 ohm per injector circuit which is about 11.6 amps (SWEET) - for sure the ecu's ghost left the box.
now who is to blame..