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: ian.g - Wednesday, May 04, 2016 at 14:58
Wednesday, May 04, 2016 at 14:58
You could try changing the fuel filter for starters, sounds as if it could be blocked or partly blocked.
AnswerID:
599516
Follow Up By: Grant L - Wednesday, May 04, 2016 at 15:41
Wednesday, May 04, 2016 at 15:41
Thanks Ian.g
Come to think of it, two
services ago found gum in fuel filter.
I do change them at each service (every 10k). last service it looked ok.
I will check that thanks.
regards
Grant
FollowupID:
868766
Reply By: TomH - Wednesday, May 04, 2016 at 18:55
Wednesday, May 04, 2016 at 18:55
Also could be lack of back pressure due to exhaust being tooooo efficient.
Almost all vehicles need a certain amount of back pressure and if you put too big an exhaust on it can alter the motors characteristics.
A 2 1/2 in should sometimes only be altered to a 2 3/4 and a #" can be too big.
Cant remember what size your original one is but have seen a thread about the subject along these lines
AnswerID:
599525
Follow Up By: Grant L - Wednesday, May 04, 2016 at 20:01
Wednesday, May 04, 2016 at 20:01
Thanks TomH,
Yes that crossed my mind but its only recently it has stated to lack pick up down low.
Regards
Grant
FollowupID:
868793
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!
FollowupID:
868806
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
FollowupID:
868845
Reply By: Mudripper - Wednesday, May 04, 2016 at 22:27
Wednesday, May 04, 2016 at 22:27
Hi Grant,
Might be worth getting the EGR valve checked, if it occasionally gets stuck in the open (recirculation) position then the engine will lose power under acceleration.
Cheers,
Tim.
AnswerID:
599537
Follow Up By: Grant L - Thursday, May 05, 2016 at 16:58
Thursday, May 05, 2016 at 16:58
Thanks Mudripper,
Iam onto it.
Grant
FollowupID:
868846
Reply By: Bigfish - Thursday, May 05, 2016 at 13:01
Thursday, May 05, 2016 at 13:01
Manifold not gunked up? Get rid of egr...
AnswerID:
599551
Follow Up By: Grant L - Thursday, May 05, 2016 at 17:00
Thursday, May 05, 2016 at 17:00
Thanks Bigfish,
Looking into it thats, three people with similar suggestions so will look into it.
Grant
FollowupID:
868847
Follow Up By: Frank P (NSW) - Thursday, May 05, 2016 at 17:52
Thursday, May 05, 2016 at 17:52
And/or install an oil catch can.
FollowupID:
868849
Follow Up By: Bigfish - Thursday, May 05, 2016 at 19:54
Thursday, May 05, 2016 at 19:54
Installing a catch can has little effect on the manifold build up of crud. Blocking the EGR off is the way to go. I have done this on my Pajero. I have also installed a catch can. The oil I have collected from the catch can is way less than what goes through the EGR system. Install both,...definately a good idea. But do the EGR for sure.
FollowupID:
868864
Follow Up By: GREG T11 - Friday, May 06, 2016 at 20:59
Friday, May 06, 2016 at 20:59
An interesting topic regards the need for blanking plates and catch cans. From my limited research certain vehicles suffer more from contamination than others, particularly Mitsubishis. I have spoken to a few people including my mechanic who have all said that the Isuzu motor does not suffer the same issues as some other CRD diesels regarding manifold clogging.
In my case from my mechanics experience he believes when a EGR valve is causing problems it is a combination of the build up of carbon and the electronic module attached to it being fickle.. Hence he recommended just replacing it @ roughly $450 odd for a genuine part half an hours labour. He gave me the old one and to me it really doesn't appear that bad if you compare it to an old Holden red motor head after the same amount of
miles .
I do suppose it is dependent on the style of driving you do, our car was bought with a reasonable expectation that it to have done 30,000 ks a year on average a lot of hwy was involved not a short run school taxi.
We are now averaging 10.3 with a camper in tow anywhere and at cruise 7.8 - 8.1 at 100- 110 kmh instantaneous .
FollowupID:
868897