Bang my head: call to all experts, Corolla

[aoun556]

in my case it was emulator fault.just give this a try it wont cost u.borrow emulator from some friend for one day and try this.u r saying it runs fine on cng even in cold so that means ur emulator is not giving correct signals to injectors thats y it stalls on petrol.if this has something to do with throttle or some sensor then it should also behave same on cng.anyways its my guess so u can try.i tried and it worked in my case.

[talhawaleed]

in my case it was emulator fault.just give this a try it wont cost u.borrow emulator from some friend for Reply With Quoteone day and try this.u r saying it runs fine on cng even in cold so that means ur emulator is not giving correct signals to injectors thats y it stalls on petrol.if this has something to do with throttle or some sensor then it should also behave same on cng.anyways its my guess so u can try.i tried and it worked in my case.

CNG changeover switch powers the three solenoid valves on reducer, monometer and Advancer/Emulator simultaneously. Changeover switch is connected with Ignition coils, so once it senses that ignition coil is receiving power or transmitting signal then with slight delay it simultaneously provides power to the solenoids, Advancer/Emulator, Monometer and stops the power to injectors through its own wiring harness. If conversion fails because of engine not receiving gas then engine shuts down, Power to ignition coil disconnects and power to solenoids, monometer and advancer/emulator is withdrawn.

What you are saying is, even though power to injectors are restored but somehow Advancer/Emulator still remains on and keeps on sending the signal originally meant for CNG to the ECU.

1. This can easily be checked by measuring the volts on solenoid valve, looking below into advancer/emulator lights such as if it is still receiving power even on petrol.

Anyway, advancer/emulator turns off on petrol, it does not control injectors timings as its only function is to stop injectors once powered on and restore the power to the injectors once advancer/emulator is turned off.

I will look into the possibility of wrong cng wiring and I already have a brand new spare TL advancer/emulator with me which I will try on this.

[mianaasim]

Our corolla was giving a similar issue. We took it to magic motors. Injectors were ultrasonically cleaned, throttle body serviced, plugs were black and so they too were replaced. Then he connected obd scanner and said that oxygen level in mixture is less than optimum, his helper adjusted something near the air filter box (I was inside the car so didnt see where). Car is normal now

He was seeing oxygen level from the obd scanner. Initially it was 11.6 percent and he adjusted it to 12

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Wat did they charged u?

[nasir_shaheen]

Dear talha I am having same problem as u had in corolla. I think u advanced ur car from tps sensor at throttle. But there is no adjustment space in tps. Plz tell me how to adjust?