Fuel pump and fuel pressure are OK.
When you start the car with idle control valve OFF then the cars idle's at 650 rpm, when you connect the idle control valve, it goes for 1 sec at 1500rpm and then it shut's off.
When you drive the car easy example 50km/h in gear 3 the car shakes, but when you press the gas pedal fully, there is no problem.
So when you really go for it there is no problem, but when driving normal with no boost then the car shakes.
When engine is cold it doesn't idle, when engine is warm, idle is 1500rpm.
Cheers Ruud