Holden Colorado 2010 3.0ltr 4X4 lack of power

Submitted: Wednesday, May 04, 2016 at 14:51
ThreadID: 132314 Views:6773 Replies:6 FollowUps:9
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Hoping someone may have answer for my problem?

My colorado lacks pickup occassionally when pulling away under load until turbo comes in at approx 1600rpm this can happen through the gears if RPM is allowed to drop below 1600rpm. This happened again the other day and seemed to reduce in severety when I turned the aircon off.

A bit of history/detail,
this vehicle is a 5 speed manual bought new then fitted 3" exhaust and P&J airfilter, left Sydney in August 2012 with 88k on odo pulling a 21' van GCM approx 5.3t,4 new injectors fitted at 170k now got 230k on clock, I dont rev through gears generally pulls very well, recently travelled down to Tom Groggin via Tumut, Cabramurra and olso up through Omeo and Mt Hotham.
Vehicle seviced every 10K brilliant economy same as when new, doesn't use oil doesn't blow smoke, other than at first start after a couple of minutes Idle will blow a small amount if throttle blipped above 3000rpm.

Am worried it is down on compression but mechanics say bottom end is bullet proof,

Any advice would be greatly appreciated.

Grant
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