I have to release the gas pedal for the car to shift into gear.

I installed a new timing belt on a 2004 vw beetle 2.0 non turbo and the teeth lines on the cam and crank seem right of what I can identify on these lines and I have to release the gas pedal for the car to shift into gear. Any clue what the issue is. Now I have a code popping up saying the car isn’t reading the cam sensor and cylinder 4 is open which gives me a small miss at times but I did change my plugs while I did my timing and water pump so guessing I damaged the wires or coil acting dumb. I never had any of these issues before the car broke down. I got lucky the timing belt lost teeth which made the motor stop while sitting at idle and luckily saved my motor I believe. It drives good if I barely hit the gas pedal driving and also allows it to shift but as soon as I put power to it it’s want shift into the next gear. Scared I’m gonna really tear this car up after investing a lot of money into it. I know once I do get it fixed I have sold so def need to figure out an answer ASAP.