Having problems with a chevy equinox

Question

I have a chevy equinox 2005 the car being running fine until my friend did a tune up on it he change the spark plug and wires but after that the next day I drove it for about 20 minutes and the engine started jerking and jumping I had the air conditioner on while it was doing it so I thought it was the transmission mouth because the rubber on it was no good so I went to the dealer and brought the part and had it replaced and I thought that was the issue but it wasn't because it did it again I had a check out the codes that came up p0455 p0496 p0650 those are evap but doesn't say anything about jerking I'M lost

Answer 1

The jerking of the engine is from the ignition system, when the engine is under load is when the problem is more pronounced, ignition sparkplug boot or the igntion coil where the its secondary is shorting to ground.