D3 MT Torque / Flat spot?

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Jay_hagga
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D3 MT Torque / Flat spot?

Post by Jay_hagga » Mon May 22, 2017 9:54 pm

Had my E91 D3 MT for a couple of months now and though well happy have a couple of questions about the power delivery. From what I can gather they're Laggy as hell and stalling them isn't uncommon lol.. Had it on the rollers to check all ok and came back with near stock figures. .193bhp and 299 lb/ft. ..max torque at around 2800rpm..is this normal? Plus when revving out and changing up it feels like there is a delay in the turbo spooling up (if that makes sence). Are these the characteristics of the mt or should I be investigating further?

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neil
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Post by neil » Tue May 23, 2017 4:59 pm

Here's the official plot for comparison:


Image

Jay_hagga
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Post by Jay_hagga » Wed May 24, 2017 12:10 am

Looking at my printout it's around 275 lb/ft at 2000 rpm..so not loads out... Would like to hear from other d3 mt owners for their views. ..looking at getting a remap possibly but want to know if I have any issues first.

Paul D3
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Post by Paul D3 » Sun May 28, 2017 1:49 pm

My low down acceleration/torque issues turned out to be sticking swirl flaps. Not enough to trigger any codes, but noticeable lack of power until reaching the turbo rpm.

Although have you driven any others?

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Post by Jay_hagga » Fri Jun 02, 2017 10:10 pm

I'm due to change a couple of glow plugs so I'll check them..I'd like to remove the flaps but think this may cause dpf issues.

big blue
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Post by big blue » Fri Jun 02, 2017 11:52 pm

I wonder how many miles your D3 has. Maybe consider a turbo cleaner process there are a couple of products on the market allowing this to be done on a Saturday afternoon etc
2021 D3S G20 #014
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Post by Jay_hagga » Sat Jun 03, 2017 12:05 am

Have done 116k and did have one of those terraclean things prior to rolling road. .. Didn't make much difference except throttle balance seemed better when cruising (if that makes sense ). Has anyone blanked their swirl flaps on the mt without any problems.

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Post by hicky73 » Mon Jun 19, 2017 10:00 pm

I read all your comments with great interest.
My D3 MT is exactly the same. Before the turbo kicks in mine (feels like a huge loss of power) really backs off and hen the turbo kicks in. So what would any of you recommend be done.

Mines done 144k and is on the motorway 6 days a week.

Have I got a problem?
http://www.static-caravan.co.uk/private ... ixon-croft
If your interested in a static home holiday then look no further 10% discount for alpina reg guys off this site
my Caravan for hire.

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Post by Paul D3 » Sun Oct 15, 2017 7:06 pm

hicky73 wrote:I read all your comments with great interest.
My D3 MT is exactly the same. Before the turbo kicks in mine (feels like a huge loss of power) really backs off and hen the turbo kicks in. So what would any of you recommend be done.

Mines done 144k and is on the motorway 6 days a week.

Have I got a problem?
Well it should be quick (well quickish 0-60 in 7.2 seconds) but the M47 engine can have a few issues that slow it down. Consider checking out:

EGR value
EGR thermostat
Thermostat
Manifold flaps / actuators x 2
MAF sensor
MAP sensor

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DonFlintoni
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Post by DonFlintoni » Wed Nov 01, 2017 12:30 am

for anything above 90k miles id also consider removing the throttle body, EGR and other inlet components. Mine were completely gunked up with carbon deposits causing me to have a big loss of power. Also due to low inlet pressure readings the DPF was not regenerating.
Former Alpina owner. Having a break.

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Post by hicky73 » Sat Nov 11, 2017 1:59 am

Thanks Paul. I will definitely look at the items you have mentioned and will let you all know the outcome.
http://www.static-caravan.co.uk/private ... ixon-croft
If your interested in a static home holiday then look no further 10% discount for alpina reg guys off this site
my Caravan for hire.

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