GLi 2010 - Long self starting

[bkdurrani]

@xulfiqar. You will be surprised that my car was checked thoroughly by Toyota guys. They asked me to go step by step, first being the fuel pressure system, followed by coils and then injectors. I have replaced the fuel pressure system including the fuel filter, pump and release valve etc. Pressure is 3.5. They checked all coils and found two coils from which current was leaking a little bit from the sides. They have cleaned the injectors to remove doubt of any clogging. Still starting behavior is unpredictable.

[saeedmagsi]

Is your car cng?

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[tintin1]

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[saboor73]

@xulfiqar. You will be surprised that my car was checked thoroughly by Toyota guys. They asked me to go step by step, first being the fuel pressure system, followed by coils and then injectors. I have replaced the fuel pressure system including the fuel filter, pump and release valve etc. Pressure is 3.5. They checked all coils and found two coils from which current was leaking a little bit from the sides. They have cleaned the injectors to remove doubt of any clogging. Still starting behavior is unpredictable.

3.5 psi ?? :o

[Xulfiqar]

@Xulfiqar. You will be surprised that my car was checked thoroughly by Toyota guys. They asked me to go step by step, first being the fuel pressure system, followed by coils and then injectors. I have replaced the fuel pressure system including the fuel filter, pump and release valve etc. Pressure is 3.5. They checked all coils and found two coils from which current was leaking a little bit from the sides. They have cleaned the injectors to remove doubt of any clogging. Still starting behavior is unpredictable.

how long does the pressure hold in the fuel system?

How did they check coils? some scope? amp pull? or just a visual?

[Xulfiqar]

do one check - remove the valve cover and inspect the intake cam timing on the variator pulley - park it to zero if its off and then try to rotate it.

[saboor73]

do one check - remove the valve cover and inspect the intake cam timing on the variator pulley - park it to zero if its off and then try to rotate it.

Sticky vvti pulley?

[Xulfiqar]

Sticky vvti pulley?

yes - its possible.

[bkdurrani]

@saeedmagsi. CNG has never been installed in this car.

[bkdurrani]

@tintin1. Today I spent the whole day at Toyota Workshop. They now focused on the electrical system. All coils were leaking current. What I believe is that if the problem is due to the poor wiring or electrical system, then I should experience the car with engine misfiring during the normal drive or the drive should be jerky. But this is not the case. I am facing this problem in the morning as well as during the entire day. i.e when I park my vehicle for some time and when I return to crank the engine, it misbehaves again. The time lag is roughly 30 minutes that the car does not start on first short attempt. Gosh!

[saeedmagsi]

@saeedmagsi. CNG has never been installed in this car.

Ok. Because mine corolla had exact same problem due to cng. The mechanics were not able to diagnose the problem. And they were doing the same hit and trial method. I had to change the plugs, fuel pump, fuel filter and injectors but the problem never ended. Then i closed the main cng cylinder valve and the car starting was perfect.

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[bkdurrani]

@xulfiqar. I went to Toyota workshop last saturday to seek the answer of your first question. They did a number of experiments. They started the car for a minute and then switched it off for an hour or so. Then again they started and the car started in a reasonable time on first self but not half self. Today they checked the coils while the engine was in idle running condition. They took out coils one by one and touched the coils with the engine outer head to check for any spark leakage. Leakage found in all coils. Now, I am not sure and even they are not sure if we replace the old coils with the new ones, what will be the outcome? Fingers crossed!

[bkdurrani]

Tomorrow again I have an appointment with Toyota doctor. This time they are going to see tappets adjustment.

[saboor73]

yes - its possible.

But how would engine start then I mean over lapping cam won't let compression built up in cylinder

[bkdurrani]

Thats good that your problem got resolved. That means CNG was the culprit in your case. But how cutting CNG supply solved the starting problem?

[saeedmagsi]

Thats good that your problem got resolved. That means CNG was the culprit in your case. But how cutting CNG supply solved the starting problem?

Cng was mixing with petrol on cranking the engine. It mostly happened when i started the car after an hour or so. The starting was normal if i started it in less then an hour.

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[bkdurrani]

ok. You also have Gli 2010?

[saeedmagsi]

ok. You also have Gli 2010?

I have se saloon

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[bkdurrani]

I see..

[saeedmagsi]

Dont just rely on mechanics. They will make you change every part of the car related to the starting mechanism. If they think that the problem is with the coils. Just ask them to use the coils of another corolla gli car that may be standing in the workshop, for checking purpose. If the car starts behaving normal then you should proceed with buying the coils.

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