AOA
For last two days I am experiencing a strange problem with my friends city its idsi 2005 on CNG. As my friend is not into repairing so it came upon me to repair his car so I took it to my mechanic. I would like to tell you that my friend is also my neighbour and once or twice a week I get to drive his car, to me its perfect. Now let me tell you how it all began. On this Sunday his car was out of gas so he had to start it on petrol, as soon as he did that the car started to phuk phuk like its missing, he drove the car in same condition to his college to take a class on his return he refilled the gas and converted to CNG the car behaved absolutely fine. So now the problem is that the car is as smooth as butter on CNG but pathetic on petrol continuous misfirring. The things done by my mechanic in last 2 days are as follows
- Checked the injectors and they are working fine
- Checked fuel pump and filter also fine
- Checked plugs also fine
- Checked tappets also fine
- Checked all Coils also fine although he did check them by a tester system not the resistance of each coil but the problem did not solve as he changed the coils
- He disconnected CNG kit but problem not resolved
After all of the above the problem has almost halved 2 days ago it was pathetic although its still pathetic. My mechanic said that run your car on highway at high rpms for 20-30 kms the problem will disappear I did that felt only a slight difference but still it misses. Now I think that mixing about 10 litres of high octane will solve the problem. The other thing he said and that really pissed me off that he will open the entire head and check fuel lines because according to him one cylinder does not work on petrol now that sounds really funny because today i stretched the car till 100 km/hr on petrol on 3rd gear and it was ready for more the engine revs easily till 5000 rpms and more but with phuk phuk. Now if one cylinder is not working how can an engine rev at 5000rpm while its as smooth as you like it on CNG. Second last time he drove the car was a month ago and that too more than 100kms on highway. Please help me as my friend is really worried we are class fellows and currently he has to take lift from me if CNG finishes