Hi all,We have a fault on a Astra 1.7cdti fitted with the Isuzu engine.The vehicle performs fine untill it reaches around 4,000 rpm and placed under demand,after this it runs in default with check light displayed.
Checked out with Tech 2 and fault code P2279 intake air system leak detected.
We have carried out a full induction leak test with smoke pro and cannot find any leaks.
Carried out actuation test on control solenoid responsible for communicating vac supply to vac cell, which in turn operates flaps in manifold.All test ok.Have road tested car and monitored datastream,cannot see any abnormal values,also removed boost pressure sensor and cleaned carbon from orifice.
Would welcome any ideas please on this problem.
Regards Trevor.