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    • By blackc30probs
      2008 Volvo C30 1.0 T5 with 130k miles.
      On cold startup the car runs rough bouncing between 1500-2000 rpm for about 10 sec before returning to 1500 until it is warm, the following codes have appeared: P0101 MAF circuit range/performance, and P0300 Random/ Multiple cylinder misfire. I have taken the following steps to solve the issue:

      About a year ago Cylinder 3 coil pack was replaced due to P303 code (issue was solved, just added as background)
      New MAF sensor was installed (after attempting to clean the stock Bosch unit, which also didn’t stop the code from reappearing) 2 weeks ago
      All 5 spark plugs replaced with Bosch units (3 months ago)
      New air filter, which was installed at the same time as the spark plugs

      The MAF problem started about a month ago, but the rough idle only 2 weeks ago, even after clearing the codes, they return after 1 or 2 driving cycles. Rough start up even happens after codes are cleared. 

      Anybody had this issue, or have any advice as to what the next steps should be?  
    • By kaseke
      Hello all, 
      maybe someone can help me or give me the instructions. 

      I have 2010 year Volvo XC60, 2.4 diesel, D4 engine, automatic transmission, AWD. 

      Problem is for some reason the car does not have turbo boost anymore. Turbo is working only after the cold start 80 km/h and then turns himself off. If the engine temperature is 90C, ignition needs to be off at least ~ 10 minutes and then turbo works again but only up to 80 km/h. And then turns himself off again. 

      At first I had problem with turbo which leaked oil, the bottom part of the engine was all oily. Second problem was smoke in the interior and under the bonnet. Smoke came from rear part of the engine, not from exhaust! No power loss, car went very well. 
      Local service they changed turbo to the new one (used but factory restored) and installed the new turbo. Oil leak was goen but smoke remained. Smoke came same place, under the bonnet, from rear part of the engine where is the turbo. I went back to the service and they did guarantee works. Uninstalled turbo and sent the turbo to the seller, who checked that everything was okay. Before the repairman started to install turbo again he discovered broken plastic tube / pipe which connects two turbos with each other. And I think this was the problem why engine sometime smoked. Also in the service they washed DPF filter. I have not any idea why because with this car I have not any problems with DPF and it worked before the service very well. 
      Ok turbo and tube were installed, at the beginning car works. Suddenly threre was not turbo boost any more. 
      No fault codes / lights in the dashboard. Diagnostics does not show any fault codes. Car is not smoking and starts up well but after the first approx. 300 meters turbo pressure is gone.
      MAP sensor is working, EGR is working, turbo valve /controller (flap) is working. No smoke from exhaust. 
      I suspect that maybe they ruined in service DPF filter or DPF filter temperature sensor. I have no idea how they did this task and this was the task which I have not ordered from him. 

      Any ideas?