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Failed MOT on emissions. Difficult fix


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Or, could be internal problems, although not likely it's not impossible. I remember a corsa with a bad misfire, turned out a valve broke off a chunk, melted thru the piston and it was still !Removed! running, albeit, terribly.

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Have you done a compression test ? As this would rule out internal issues.

Checked for breaks in the engine loom ,wiggle the wires near the suspect cylinder coil pack wiring.

Are the coil pack plugs definitely plugged in the right way?

As I plugged the front cylinder and rear cylinder in the wrong way round once [emoji5]

And had the same sort of symptoms as the firing order was wrong on one head [emoji4] !Removed! thing still started and run though lol

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