Customer complaint lack of power and flashing glow plug light.
Using scan we scanned for codes and retrieved code p2563 turbo actuator position.
Understanding that this fault can appear for any number of reasons we set about our logical tests.
We carried out road test to confirm customer complaint and monitor data log.
we confirmed low boost pressure.
We started by testing voltages at the turbo position sensor.
Confirmed the power ground and signal all ok.
We then used vacuum pump to test sensor through its full range and confirm it can read correctly and turbo wasn’t sticking so we now know that data we seen earlier is good information and turbo isn’t moving.
We move onto testing control of turbo this turbo is control via an electronic solenoid which varies amount of vacuum supplied for different amounts of boost.
We found the solenoid had correct power and ground side control and was able to function correctly.
But vacuum supply to solenoid was only a mere 1.6inhg when we were expecting over 25inhg.
Setting about testing we find 28inhg from vacuum pump.
We find 28inhg just after one way valve.
But then next point where splits in different directions we have low.
So we have now proved we have a good supply vacuum its being lost but where?
So we isolated each of the 3 sections in turn and found which of the 3 was causing the drop
We found a pipe not connected due to broken connector.
We were able to carry out a repair saving the customer 100s of pounds – a fraction of the cost of turbo that if fitted would have never fixed it. We have the added bonus of getting this vehicle back on road and earning the owner money within just a few hours of us receiving it.