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Author Topic: GM 2.0DTi lacking power  (Read 10691 times)

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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #45 on: 30 March 2014, 14:09:56 »

Give it some millers diesel additive,used to use it in my dti and did help  :y
It had Diesel Magic a couple of tanks ago
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Taxi_Driver

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Re: GM 2.0DTi lacking power
« Reply #46 on: 30 March 2014, 18:03:26 »

when was the last time the inlet manifold/swirl flaps cleaned out, i found it made a huge difference to mine when it was cleaned , messy job but well worth it to get the power back and helped reduce turbo lag a bit.
Probably never. TIS implies that the pump has to be bled with KM948 once the injection pipes have been off, which means its not something I can currently do.

Not needed.

Idealy you would have a priming bulb in the fuel filter fuel feed line but, you simply crack the high pressure injector pipes and crank for short intervals with half plus throttle applied until you see fuel from the lines. Then nip up and away you go.

ive tried this way on 3 different cars with the dti engine and cracking the high pressure pipes never seems to work for me

Interesting, never failed for me as long as its only the high pressure lines you touch.

If you touch the pump feeds or drain the pump then its a big issue

Do these engines not self bleed?

I know on the 1.9 trafic i had, there was a bleed bulb by the pump to bleed it (rubbish fuel gauge on these, meant i ran out of fuel a few times  ::) )

But on the 2.0 passat, you just seem to have to crank it over and it will start after about 30secs ..
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #47 on: 30 March 2014, 19:36:55 »

Do these engines not self bleed?
Most definitely not. Attempting to start with no fuel quickly shags the pump, as the diesel fuel is the only lubrication.
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #48 on: 30 March 2014, 19:37:33 »

So, would it be safe to change the leak-offs without any facilities to bleed the pump?
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Taxi_Driver

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Re: GM 2.0DTi lacking power
« Reply #49 on: 30 March 2014, 19:48:14 »

Do these engines not self bleed?
Most definitely not. Attempting to start with no fuel quickly shags the pump, as the diesel fuel is the only lubrication.

Ah ok  :y

I guess theres not a tank pick up pump in these then.....as thats when i discovered the passat will start if you keep cranking after it had to have a new tank pump....
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #50 on: 30 March 2014, 19:57:07 »

Do these engines not self bleed?
Most definitely not. Attempting to start with no fuel quickly shags the pump, as the diesel fuel is the only lubrication.

Ah ok  :y

I guess theres not a tank pick up pump in these then.....as thats when i discovered the passat will start if you keep cranking after it had to have a new tank pump....
I believe there is a lift pump, but airlocks are problematic.
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Andy H

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Re: GM 2.0DTi lacking power
« Reply #51 on: 30 March 2014, 20:10:33 »

With the swirl flaps activated, the engine won't rev beyond about 2k, it just misses as if its running on 3, and belches smoke. Not sure why this would be, as the inlet air should be fast enough by that rpm for the extra inlet valve to work  :-\
Have you cleaned out the intercooler yet?
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Taxi_Driver

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Re: GM 2.0DTi lacking power
« Reply #52 on: 30 March 2014, 20:11:16 »

Do these engines not self bleed?
Most definitely not. Attempting to start with no fuel quickly shags the pump, as the diesel fuel is the only lubrication.

Ah ok  :y

I guess theres not a tank pick up pump in these then.....as thats when i discovered the passat will start if you keep cranking after it had to have a new tank pump....
I believe there is a lift pump, but airlocks are problematic.

Maybe the pump only pumps for a few seconds then  :-\
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TheBoy

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Re: GM 2.0DTi lacking power
« Reply #53 on: 30 March 2014, 20:22:04 »

With the swirl flaps activated, the engine won't rev beyond about 2k, it just misses as if its running on 3, and belches smoke. Not sure why this would be, as the inlet air should be fast enough by that rpm for the extra inlet valve to work  :-\
Have you cleaned out the intercooler yet?
Nope, that's one of tomorrows jobs. Looks like bumper has to come off?
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martin42

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Re: GM 2.0DTi lacking power
« Reply #54 on: 30 March 2014, 20:23:39 »

Wonder if the timing is out a bit,if pump has been replaced in the past.
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Re: GM 2.0DTi lacking power
« Reply #55 on: 30 March 2014, 20:25:43 »

Wonder if the timing is out a bit,if pump has been replaced in the past.
Can't imagine anyone would ever change a pump, you'd scrap the thing instead...

...I have a gut feeling, unscientific, unproven, undiagnosed, just pure gut feeling that the fuel pump is shafted. Which I suspect means it will become baked bean tins  :'(
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Re: GM 2.0DTi lacking power
« Reply #56 on: 31 March 2014, 17:33:21 »

Found out that she needs a car tomorrow, and with the MV6 off the road, didn't want to start ripping off bumpers at this late stage in the day, so still haven't checked intercooler  :-[
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Re: GM 2.0DTi lacking power
« Reply #57 on: 31 March 2014, 17:34:37 »

When I do get it off, what do I do, just pour oil out? Clean it, if so what with?
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Andy H

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Re: GM 2.0DTi lacking power
« Reply #58 on: 31 March 2014, 19:35:06 »

When I do get it off, what do I do, just pour oil out? Clean it, if so what with?

Land Rover TDis are prone to blocked up intercoolers. Two guides here (usual caveats apply about stuff you read on the internet...)

http://forum.lro.com/viewtopic.php?t=1811&highlight=intercooler+cleaning

http://www.discovery2.co.uk/intercooler.html

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Re: GM 2.0DTi lacking power
« Reply #59 on: 31 March 2014, 20:16:55 »

When I do get it off, what do I do, just pour oil out? Clean it, if so what with?

Land Rover TDis are prone to blocked up intercoolers. Two guides here (usual caveats apply about stuff you read on the internet...)

http://forum.lro.com/viewtopic.php?t=1811&highlight=intercooler+cleaning

http://www.discovery2.co.uk/intercooler.html
So solvents like white spirit :y. Ta
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