I had my car tuned may last year and everything was running great. Drove it untill august when it started to missfire on boost sometimes. The problem got worse and I thought it was a dying coil.
I stored the car away for the winter and when I took it out this year changed a faulty coilpack but the problem remained.
I checked everything from injectors to sensors and leaks. Everything was good and when I put the stock ECU back in it ran perfect.
With the PFC it runs super rich and if you leave it on idle it gets soaked and dies. When you drive it and reach full boost it starts to detonate instead.
Iīm guessing that the PFC is iether broken or have gone back to factory setting or something...
I have searched the web and canīt find anybody with the same problems as me.
Have you guys heard anything like this or have any ideas of what I could check or do?
Iīm trying to reach the guy who tuned it but canīt get a hold on him. And I canīt take it to another tuner as I canīt find any who is not fully booked for months ahead.