AOA Brother, I have Suzuki Mehran 2014 VXR and facing exact same problem as yours, can you kindly inform that if you yet diagnosed the problem, here I am telling a brief summary of my problem, 'car start jerking and missing after 80 - 90 km continuous drive in very hot days, car engine does not heat up at all, nothing else happens, AND MOST IMPORTANTLY MENTIONING AGAIN, 'IT ONLY HAPPENS IN VERY HOT HAZY SUNNY DAY TIME AFTER 80 - 90 KM CONTINUOUS DRIVE' , and when it is stopped and let to cool down for like an hour or two in shade, its ready to roll again, fuel pump, injector, fuel filter are already checked ok, changed all spark plugs, couldn't diagnose the issue, need someone like House MD for cars specially Mehran (lol)'
any help will be highly appreciated, thank you.