[po914]

Hi, i'm new here. Would like to ask for help with my 1989 Euro 930 turbo. The car is 100% stock, so factory turbo, wastegate,...

When i drive the car slowly (no boost) there is no problem. But when i floor the pedal and go above 4000rmp the car hesitates, hiccups. Feels just like all the power is gone.
Verry strange and brutal feeling. There is no problem in 1st and second gear, then i can rev it up at full boost untill the redline.

What could it be? Have read some other treats but i want to be sure before i order new parts.
- Bad fuel pump or filter ?
- Wastegate/intercooler piping broken?
- Wastegate spring or diaphragma?
- Spark plug wiring?
- Boost cut off switch?
- Overboost switch or relais?

Thanks for your help !
Greetings from Belgium

Cedric