Vitz CNG jerk problem

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Vitz CNG jerk problem

Hello !
I am facing a problem in my 2003 Manual Vitz. It gives a jerk while picking up in first gear. Theres no such problem at petrol. This problem has arived since I got the tuning/throttle body/MAF sensor cleaning done by a local shell pump guy(bloody idiot)...I have shown the car to many mechanics/CNG walas and it seems that the problem is in the advancer(by changing the advancer it worked well) but hopefully it can still be something else since it started only after I got the tuning done from the shell guy.
Please advice if u guys have any clue to this..

Gari.pk User 7015 asked on 17 Aug 2010 11:49:35 am

1 Answer

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Zain - on 17 Aug 2010 11:49:52 am

I had a similar issue. And I think I know what the problem is. But before I say anything, can you please explain what you mean by:
and it seems that the problem is in the advancer(by changing the advancer it worked well) ????

Have you already found out the problem (advancer)?? OR
You have changed the advancer and you still have the issue ??

Please let me know.

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