Ssangyong Korando Lack of power

[Bez]

Please help. My daughter has a Ssangyong Korando Auto with an intermittent lack of power problem. The vehicle drives beautifully for a while then just has no power. If Travelling on a straight or downhill it will maintain its speed but will not increase speed at all. The vehicle revs will climb but no response. If she stops just for a second the vehicle drives beautifully again. . Needless to say at times she prays for a toll gate!
This also results in really bad fuel economy,.
The turbo has been redone and the inter cooler cleaned. Now people are suggesting it is a gearbox problem . (Transmission) could this be? Other ideas are a blocked exhaust. Unfortunately it is too costly to repair by elimination. Has anyone has this problem? Where can we find a GOOD mechanic. In the Durban area ?
Please any feedback will be appreciated.
Korea does not reply!!

[Bez]

Sorted .Blocked exhaust!

[hagehage]

Hi, I have EXACTLY the same problem and symptoms as you described! Could you tell me exactly which part of the exhaust was blocked? Would be a HUGE help! Thank you

[hend]

The 1st thing that would block is the catalytic convertor. This is the 1st box after the turbo


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[hagehage]

Sorted .Blocked exhaust!

Would someone be able to notify Bez directly? I'm not authorized to send a message to him but I'm very keen to know which part of the exhaust was blocked!