would a pi305 code cause the car to jerk

Do you mean po305? This code is telling you that there is a misfire in cylinder #5, causes are fouled spark plug, bad wire, low compression, or bad coil for that cylinder if the cylinders all have there own coil. Yes it would cause a jerk, so to me it sounds like spark. And how did you get the code?

I replaced all the coil packs and plugs and it's still jerking?