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Author Topic: GM 2.0DTi lacking power  (Read 9560 times)

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TheBoy

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GM 2.0DTi lacking power
« on: 17 March 2014, 19:43:24 »
As many know, I have a 2.0DTi Zafira shitbox for specific reasons, including a UK holiday next week.

Its had a replacement turbo (thanks MDTM) as the old one was a "bit" worn, and a new MAF, as the old one was most likely oil contaminated due to shagged turbo.  Both of these improved the power, and reduced the EML frequency. But it still wouldn't pull the skin off a rice pudding. If I had to estimate power, given its weight, I'd say its giving about 50-60bhp.

Last set of codes were P0105 Critical Malfunction 2 and P1100 Critical Malfunction 1 - both these point towards either turbo or MAF, though since changing MAF earlier today, only seen this once now, and can't repeat (I could guarantee to get them before, by revving about 3k rpm in top gear).

EGR cleaned (twice), MAP cleaned (twice). Swirl flaps not cleaned yet, but seem to be free to move.


Any experts?
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Kevin Wood

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Re: GM 2.0DTi lacking power
« Reply #1 on: 17 March 2014, 19:45:54 »
Mum bus, eh? ???

As said, I have a log from a good one and a broken one, albeit a 2.2, if you need them. :y
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Jimbob

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Re: GM 2.0DTi lacking power
« Reply #2 on: 17 March 2014, 20:04:57 »
Memory states those codes can be vaccuum related....
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Kevin Wood

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Re: GM 2.0DTi lacking power
« Reply #3 on: 17 March 2014, 20:16:07 »
There's a set of diagnostic steps under those codes in TIS which check out all the vacuum actuators - EGR, boost control and the swirl flappy things.
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chrisgixer

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Re: GM 2.0DTi lacking power
« Reply #4 on: 17 March 2014, 20:25:07 »
Blocked exhaust.

No I know. No idea me.
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #5 on: 17 March 2014, 20:54:58 »
Quote from: Kevin Wood on 17 March 2014, 19:45:54
Mum bus, eh? ???
Yeah, need something that can carry 4/5 adults AND luggage. And once I get back, it will be my storage facility ::)
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #6 on: 17 March 2014, 20:55:42 »
Quote from: chrisgixer on 17 March 2014, 20:25:07
Blocked exhaust.
That thought had past my mind, but didn't think diesels block exhausts like petrols block cats?
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Andy H

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Re: GM 2.0DTi lacking power
« Reply #7 on: 17 March 2014, 20:57:35 »
Quote from: TheBoy on 17 March 2014, 20:55:42
Quote from: chrisgixer on 17 March 2014, 20:25:07
Blocked exhaust.
That thought had past my mind, but didn't think diesels block exhausts like petrols block cats?
They do block intercoolers......
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #8 on: 17 March 2014, 20:59:04 »
Quote from: Andy H on 17 March 2014, 20:57:35
Quote from: TheBoy on 17 March 2014, 20:55:42
Quote from: chrisgixer on 17 March 2014, 20:25:07
Blocked exhaust.
That thought had past my mind, but didn't think diesels block exhausts like petrols block cats?
They do block intercoolers......
Mr DTM checked for blocks and leaks, and declared it OK, although did have a bit of oil in it
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Kevin Wood

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Re: GM 2.0DTi lacking power
« Reply #9 on: 17 March 2014, 21:27:34 »
Quote from: TheBoy on 17 March 2014, 20:54:58
Quote from: Kevin Wood on 17 March 2014, 19:45:54
Mum bus, eh? ???
Yeah, need something that can carry 4/5 adults AND luggage. And once I get back, it will be my storage facility ::)

Ah, mobile tool chest. :y
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #10 on: 17 March 2014, 21:39:21 »
Quote from: Kevin Wood on 17 March 2014, 21:27:34
Quote from: TheBoy on 17 March 2014, 20:54:58
Quote from: Kevin Wood on 17 March 2014, 19:45:54
Mum bus, eh? ???
Yeah, need something that can carry 4/5 adults AND luggage. And once I get back, it will be my storage facility ::)

Ah, mobile tool chest. :y
Mobile would be good right now. My definition of mobile is something that can set a 0-60 time :P
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05omegav6

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Re: GM 2.0DTi lacking power
« Reply #11 on: 17 March 2014, 21:54:03 »
Quote from: TheBoy on 17 March 2014, 21:39:21
Quote from: Kevin Wood on 17 March 2014, 21:27:34
Quote from: TheBoy on 17 March 2014, 20:54:58
Quote from: Kevin Wood on 17 March 2014, 19:45:54
Mum bus, eh? ???
Yeah, need something that can carry 4/5 adults AND luggage. And once I get back, it will be my storage facility ::)

Ah, mobile tool chest. :y
Mobile would be good right now. My definition of mobile is something that can set a 0-60 km/h time :P
Fixed :y
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martin42

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Re: GM 2.0DTi lacking power
« Reply #12 on: 18 March 2014, 06:53:13 »
Theres 2 vacuum pumps infront off the battery,if the pipes are swapped over can throw up the eml light,which can easily happen if somebody has removed them previously.
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #13 on: 18 March 2014, 09:48:06 »
Quote from: The Mad mechanic on 18 March 2014, 06:53:13
Theres 2 vacuum pumps infront off the battery,if the pipes are swapped over can throw up the eml light,which can easily happen if somebody has removed them previously.
Cheers. Vac layout matches the diagram in the GM documentation, and tech2 manual activation of the EGR, Swirl flaps and turbo wastegate all activate the correct actuator :)
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martin42

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Re: GM 2.0DTi lacking power
« Reply #14 on: 18 March 2014, 10:29:46 »
They are not the,best engine to have in a zafira,only 100 bhp and,not very quick,remap might help tho,but why not stick a,v6 in it ....
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