snore

Alright guys, I have a 2007 Audi A3 B9.
Cold air intake
Auto tech Hp fuel pump
Catless downpipe
s3 injectors
Cts turbo Ko4 1050
BOV kit

I recently finished my final upgrade in order for a stage 2+ . Car ran great after every install until I installed the HPFP. At first it checked out, went for a test drive and it ran fine with it. Half way through I lost boost and was under powered. Took it home ran a scanner and got Low fuel rail/pressure.Double checked my work and reinstalled pump again. Started the car and it maxed out the revs immediately. Sh*t my pants and turned it off. First thing I did was check for a vacuums leaks.Nothing. Then tried running the car again for a more codes. Car idled fine. Once putting any amount of gas the revs would bounce between 450-3000 with misfires and would stall after hitting 3000. Thought it was a stuck or faulty DV. Replaced it. Problem continued. Reinstalled old pump. Problem continued. Got a another fuel system low code and SENSOR code, thought this was it finally something to go off of. Replaced fuel pressure and thrust sensor. Problem continued. Now I have 5 new codes

What i’m thinking. Pain and that maybe my ECU is upset with the amount of bolt ons and no tune

Please give any ideas it would be much appreciated!

JorgeMX

Interesting.. im seeing a lot of same codes that appear on my tt which im diagnosting too, mine is fully stock but im thinking of some short or eathing issue, idkn since you have done couple mods maybe a wire or connector got loose or broke. aiming for electrical issue

JorgeMX

thats the tt scan