Astra G Z17DTL 2003 Boost Press Sol valve pulse ratio questionArchived Message
Posted by dave jacko on July 17, 2008, 6:58 pm
Can somebody please confirm my suspicion's that i am a thicko. Have this astra with whats turning out to be a pain in the arse fault. Keeps flagging P1125 (boost press Signal out of range)
Am i correct in understanding that the boost pressure sol valve is PW modulated, therefore if i watch live data "pulse ratio boost press sol valve" at idle and the data is 95% this would mean that the ecm is rapidly pulsing the valve i.e less voltage at valve meaning that valve would be open allowing full Vacuum down to Turbo Actuator ? Then if i rev engine out and pulse ratio reduces to lets say less than 50% this would mean more voltage at valve and reducing the amount of vacuum to the Turbo actuator ?