Vitz engine check light always on at CNG

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Vitz engine check light always on at CNG

Hey buddys!

1. I own a vitz 2003 model auto transmission and i am running it on cng for last 2 years. the engine check light never goes off when i drive on cng but on petrol it is otherwise. so anybody plz let me know if there is any problem with the ECU (i m not very good at technicalities).

2. Secondly, it does not go more than 105km/h on cng after a great effort where as my friends 2000 vitz with similar condition goes more than 120km/h with a blink on cng. i m very much desperate at this situation.

3. Plz tell me if there is something to be replaced apart from Fuel Filter, Oil and Air filter (coz i have already done that but no improvement observed). and what is the best place or a good mechanic in Lahore who understands all these things wisely

Gari.pk User 7030 asked on 18 Aug 2010 10:47:59 am

1 Answer

282 views |

Zubair - on 18 Aug 2010 10:48:21 am

Its your 02 sensor. The ECU cannot convert to closed loop operation due to the 02 readings when the car is immediatly turned to CNG. The MIL is caused by the pulsewidth increase on cold starts. Simply put,just start the car on petrol, warm it up till the idle settles down. Switch to gas, no MIL.