Yr my SE SALOON COROLLA was missing alot both on petrol and CNG. I tried 2 different mechanics...one shifted the impulser wire of CNG from one spark plug to another...the problem got fixed..but for a day only..the next day, car started to miss again. the other mechanic just tuned the car which lasts for several hours only.Then this saturday i went to Lasbella to finally see a good mechanic named MURAAD (my dad's colleague told me about him). He thoroughly cleaned the CNG KIT,Throttle and most importantly the CNG CYLINDER!!, he also changed the 4 spark plugs from DENSO to NGK ones. which costs me 700 rs. i was surprized to see the cylinder cleaning..almost a cup of brown liquid (mechanic called it OIL) came out of it. i m posting a picture.
I hope u guys will find it interesting as it gave me a hell of a surprize. the mechanic told me that this is due to poor quality of gas from bad CNG filling stations.
MURAAD bhai charged Rs.1300 for the whole job. Its been 3 days now. and the car is running like BOOOOOOOMM>>>!!! :D