I also sent an email to Toyota Indus Motors and stated the problem. They forwarded my email to Toyota Walton Motors Lahore and an appointment was arranged about which I mentioned in my previous posts.
First a mechanic came and tried to diagnose the problem. I told him the RPM drops whenever an electronic equipment is ON while moving. He tried to reproduce the problem on the standing vehicle. Whenever any electric equipment was switched the RPM dropped. He said its normal and showed me a brand new ready to deliver GLi. I told him that I understand this behavior while the car is standing but I am talking about the moving car.
Then another foreman came and did a road test. He said the RPM should not drop so much. He said throttle body needs to be serviced or someone have alter the settings. I told him you can check the service history, the car is only 10,000 km driven and it always came to Toyota Walton Motors for maintenance. And I am not going to pay for the service. then they clean the TB without removing. But the problem is still there.
I think these dealership will not do anything about it. A member mentioned in his posts that the battery can be the main culprit and he seems to be logical. I am planning to change the battery to a bigger one.
I think if any member has a bigger battery (55AH to 65AH) in his other car, he can test it right away by putting the bigger battery. I think this problem can be solved this way.
Please let us know if anyone has tried bigger battery.