It’s a long story so bear with me. My mehran is continually having problems and the reason that i can think off is following; i went to an AC shop in June, while filling in gas that person disconnected temperature gauge. My car started heating up and i did not know about that also i had water use up problem on AC. One day black smoke started emanating (coming out) from engine so i had to wait to cool it down till i took it to workshop. After 2 months, when i started car it didn't start but self-sound were clear and it was strange like kheeeeen. I took car to work shop and i had to spend 8000 rs for engine valve change. After this work, car mileage has gone down substantially (3.57RS/km: full cylinder used up in 70 km) and also it is using up engine oil. Engine pick is dead on CNG. My car is 2004 model and it is 63000km driven. Before going to AC shop my car had no problems. What should i do now? Another problem is that when car is on signal its engine vibrates the whole car and if my hand is on steering it vibrates like mobile. Can you guys tell me about very good mechanic with reasonable labor-wage demand in Lahore? I live near wahdat road.