Hello all,
I Own a 2007 Mercedes Sprinter 311Cdi with the 2.1L I4 Single turbo Diesel engine. The van has 196000 miles and has a new engine put In which has approx 80000 miles (old engine threw a rod!).
We have been chasing an UnderBoost P0299 code for months now and can not figure it out. Sometimes it will run fine, boost ok and run well without any strange noises
However recently it has been boost cutting in higher RPM. Almost sneezing and a strange whining noise under boost. During the boost cut the Turbo Actuator position is cut to 5% and the EGR valve cuts to 5%
The van has….
- New Turbo and Actuator (Garrett)
- New intercooler
- No visual damage to the turbo pipe work
When running, I open some diagnostics on my iCarSoft CR V3.0 and been checking a few things. When boost cuts the EGR and Actuator both cut off to 5% and won’t come back unless key turned off and on.
Also been looking at Exhaust Back Pressure, at 3000rpm I am seeing 3460hpa and 638hpa pressure differential in the DPF
I’ve got plenty of logs of data if any questions but at a complete loss of what’s causing this boost issue. Sorry for the long post but any help would be greatly appreciated
I Own a 2007 Mercedes Sprinter 311Cdi with the 2.1L I4 Single turbo Diesel engine. The van has 196000 miles and has a new engine put In which has approx 80000 miles (old engine threw a rod!).
We have been chasing an UnderBoost P0299 code for months now and can not figure it out. Sometimes it will run fine, boost ok and run well without any strange noises
However recently it has been boost cutting in higher RPM. Almost sneezing and a strange whining noise under boost. During the boost cut the Turbo Actuator position is cut to 5% and the EGR valve cuts to 5%
The van has….
- New Turbo and Actuator (Garrett)
- New intercooler
- No visual damage to the turbo pipe work
When running, I open some diagnostics on my iCarSoft CR V3.0 and been checking a few things. When boost cuts the EGR and Actuator both cut off to 5% and won’t come back unless key turned off and on.
Also been looking at Exhaust Back Pressure, at 3000rpm I am seeing 3460hpa and 638hpa pressure differential in the DPF
I’ve got plenty of logs of data if any questions but at a complete loss of what’s causing this boost issue. Sorry for the long post but any help would be greatly appreciated