My car is Toyota Corolla NZE 121, Manual transmission, 2003 model, 75,000km
It occationally gives ignition sound on first gear and reverse gear (particularly when the car is started off on a slight inclination)
I did a thorough injector cleanup/ Throttle Body clean up and replaced spark plugs. The the issue still prevails.
What can the problem be. How do you think I should get rid of the problem.