Holden Colorado 2010 3.0ltr 4X4 lack of power
Submitted: Wednesday, May 04, 2016 at 14:51
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Grant L
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
Reply By: 9900Eagle - Wednesday, May 04, 2016 at 20:27
Wednesday, May 04, 2016 at 20:27
The variable vane turbo may not be adjusting properly to the different engines demands.
With free revving the engine, it is normal for it to blow a bit of black and as you said it stops straight away.
I don't know if that air filter is an oiled one but that can cause problems with engine intake sensor readings if it is over oiled.
I wouldn't worry about the bottom end and as it is only in a certain engine rev band
Won't hurt to look at fuel filters but I doubt that is a problem as it is restricted to to lower rev range and it will starve much more for fuel at higher revs.
You maybe able to use a scangage to pick up loss of low down boost or a good diesel dyno tuner should be able to
check the air fuel ratio and power output through the rev range to
check on the turbo.
AnswerID:
599532
Reply By: GREG T11 - Wednesday, May 04, 2016 at 22:09
Wednesday, May 04, 2016 at 22:09
Hi Grant, have a 2011 model with 150k on it purchased early this year. After testing 3 others it was the
seat of the pants a better car type decision. It felt stronger down low and had a better history than the others at that point.
Economy was 9.4 average at time of purchase so o.k there. 2 months down the track it would not start one day and a scan revealed a fault in the EGR system. ( stuck open / closed ) . To cut a long story short a new EGR valve was fitted and the low end response improved significantly.
Prior to it failing there was no evidence of anything wrong, except for the bloody fuel gauge which I am still getting used to.
AnswerID:
599535
Follow Up By: Mudripper - Wednesday, May 04, 2016 at 22:28
Wednesday, May 04, 2016 at 22:28
Beat me to it Greg!
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Follow Up By: Grant L - Thursday, May 05, 2016 at 16:57
Thursday, May 05, 2016 at 16:57
Thanks Greg,
That I will investigate
Regards
rant
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