Why does my Mehran misfire on petrol but runs smoother on CNG?

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Why does my Mehran misfire on petrol but runs smoother on CNG?

The car misfires and hesitates when I drive on petrol, but when I switch to CNG, the engine runs relatively smoother. Could a faulty ignition coil be causing this? What other components should I check along with it?

Gari Specialist asked on 17 Apr 2025 12:03:04 pm

1 Answer

11 views |

Gari Master - on 17 Apr 2025 12:05:40 pm

Petrol requires a stronger and more consistent spark, so if the ignition coil is weak, it’ll misfire on petrol but may still work okay on CNG. This could indicate:

Weak coil o r bad plug wires

Dirty fuel injectors o r carb jets on petrol side
Also check the plugs and timing, but the ignition coil is a likely cause here.