I have a 1997 Audi a4 quattro 2.8

The first problems I had was while I was driving I felt my car struggle to drive and putter, then shut down. The camshaft had broke so I replaced the driver side head with a used one and put in a new timing belt.

Still the car would not start up. It would turn, turn, and catch spark but would never start. (Only sometimes with pumping the gas then holding it to the floor). I had disconnected the boost sensor and it started right up. So I replaced that sensor, plugged it back in, and it still wouldn’t start. So I replaced the other two sensors that were a part of the MAF.

It started right up with a little hesitation. So I decided to drive it and while I was at a stoplight, the car did shake roughly but it never died. However, while on the highway going 70 it did the same thing. It shut off while driving.

I checked the codes with a computer and the same 3 pop up.
---air intake bypass
---MAF sensor
---high and low input

I had checked and fixed all three the first time it died.

I am stumped!!! Anyone have any ideas????