I wanted some help regarding a problem in my yaris. I have a yaris 2002 manual with cng. Its awesome runs great on CNG, excellent performance with good consumption. (Thanks alta for this great car. Got it from your contact here in pindi) Ran outstanding on petrol but recently a problem has developed. When i start it on petrol and when just after starting the rpm is low, the techometer goes to 0 and the car starts to vibrate. The rpm is almost 0 and the car does not respond to the accelerator for about 6-7 seconds. It keeps on vibrating on almost 0 rpm even if i keep the accelerator pressed. Then after about 6-7 seconds, it gets ok. This is currently happening right after starting. Runs fine after that. I thought that maybe petrol and gas are getting mixed so I got it checked by removing all CNG equipment, all CNG pipes, emulator advancer etc, got throttle body serviced but it was still happening. The guy said that he has seen this problem in many vitz and platz and its either the injector or the fuel pump. Any help guys?? Storm and friends!!!