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Good day, Please maybe you can help me on this I recently bought a chevrolet spark 1.2ls 2012 /13 keeps on jerking. I changed the ignition coil and spark plugs and the engine check light is gone but it tends to loose power on the steep and start to jerk again but not heavily though any ideas what might cause this problem I noticed there is insulation tape in the leads, you reckon that might be the problem or is something else?

Good day hopefully you will help to diagnose this problem, my chevy spark 1.2ls is jerking, I've changed the ignition coil and spark plugs and the engine check light is gone but it tends to loose power on the steep and start to jerk again but not heavily though any ideas what might cause this? Another thing I've noticed is that the leads one of them has an insulation tape pan widget