Hi I was wondering how much and what is effecting the car if it needs a new HPU or Hydraulic Power Unit the problem is that it sometimes stalls when the car is standing still sometimes is that the problem, the car is a Toyota Spyder?
Stalling at idling can be due to various factors and diagnostics have to be carried out to determine the cause. If the idling speed is erratic, dirty throttle body and Idle Air Contol valve are the the msin cause. Cleaning them shoudl solve the problem. If the Check Engine Light is indicating, then you need a scan to retrieve the trouble code to proceed from there.