Gen 3 Liberty 2.0 miss fire/lumpy idle

Posts specific to the 2.0 litre NA engine

Gen 3 Liberty 2.0 miss fire/lumpy idle

Postby MILK » Wed Jan 20, 2016 11:08 pm

I've got a Gen 3 2.0NA and I'm trying to figure out what's causing it to have a lumpy idle. A mechanic also reckons it's not firing on all cylinders just from a quick listen. I pulled of leads one by one and didn't notice anything too much. I then replaced leads, no improvement. I did the sparkplugs, most were pretty fried and one was really fouled. After that it seemed to run a lot smoother but the rough idle was still present once it was warm. I then took of the IACV and cleaned it with carby cleaner and inside where it sits. It was extremely fouled and I thought this may be it, but when I put it back in still no improvement.

I'm not sure where to go from here.

Any ideas?

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