Jerks in 1st gear at low rpm - Khyber CNG Issue

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Jerks in 1st gear at low rpm - Khyber CNG Issue

My Khyber CNG takes jerks in 1st and 2nd gears at low rpm and becomes fine at high rpm.
Pls note the following recent repairs;
1) Plugs and plug wires are newly installed.
2) I opened the cng kit's oil drain screw but there was no oil trapped inside.
3) There was air leakage under the air cleaner assembly, I repaired the rubber seal between carb and air cleaner and now there is no air leakage in the system.
4) Carb is looking quite dirty and clogged but I don't think dirt in carb can cause such problem on cng (correct me if I am wrong).
5) CNG kit is looking dirty/oily from outside.
6) Tappets are recently adjusted.

Advice from cng experts is needed.

Gari.pk User 9832 asked on 09 Oct 2010 10:58:29 am

1 Answer

456 views |

Zain - on 09 Oct 2010 10:58:43 am

depends on whether the same is felt on petrol or not which gives a clue as to whether its a universal problem or something localised with cng.

besides, it could be ignition timing problem, valve problem, engine mechanical problem, fuel mixture etc etc etc. we need more details. did the problem start recently after a tune up or oil change or anything?