I would appreciate if some mechanics could give me some pointers/directions. I don't have the van with me, customer has to drive it and I can see it for limited time.
Originaly it came with DPF soot too high for regen, I replaced it with another used DPF. Couple months later he came back with no boost.
This time with code 2623 charge air system- offset drift at idle. I replaced MAP/boost sensor, inspected the turbo vanes and the orange gasket, tested with smoke leak detector and repaired leaky air tube connection (O-ring) below air filter box on right. After that the code was gone but still no boost. At idle the reading is about 800-900 hpa and under full load only goes up to 1290 hpa and charge pressure positioner is at 5% the whole time.
With my scan tool I can actuate the positioner at raised idle to 90% and visually confirm the positioner linkage move freely and charge hoses building pressure peaking at 1290 hpa. I did not find any other leaks not even cracked intercooler hoses. I have removed and cleaned EGR valve (was working fine and it wasn't that dirty).
Currently it has no codes and van drives ok except lack of power. I will try record data next time.
Originaly it came with DPF soot too high for regen, I replaced it with another used DPF. Couple months later he came back with no boost.
This time with code 2623 charge air system- offset drift at idle. I replaced MAP/boost sensor, inspected the turbo vanes and the orange gasket, tested with smoke leak detector and repaired leaky air tube connection (O-ring) below air filter box on right. After that the code was gone but still no boost. At idle the reading is about 800-900 hpa and under full load only goes up to 1290 hpa and charge pressure positioner is at 5% the whole time.
With my scan tool I can actuate the positioner at raised idle to 90% and visually confirm the positioner linkage move freely and charge hoses building pressure peaking at 1290 hpa. I did not find any other leaks not even cracked intercooler hoses. I have removed and cleaned EGR valve (was working fine and it wasn't that dirty).
Currently it has no codes and van drives ok except lack of power. I will try record data next time.