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Author Topic: White smoke on hard acceleration  (Read 507 times)

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June 20, 2018, 11:04:34 AM

paulrog

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White smoke on hard acceleration
« on: June 20, 2018, 11:04:34 AM »
Hi,

I have a 2010 4.0d, and last week when accelerating hard onto a motorway I saw a huge amount of white smoke, I immediately stopped accelerating and the smoke disappeared.

No warnings on the dash, nothing, the car drove normal.

Now, I had not driven the car for a few weeks before then as I've been away.

I've checked the coolant and I don't think it's going down.

Anyone got any ideas?

Thanks.
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June 20, 2018, 12:44:45 PM
Reply #1

Chrispy

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Re: White smoke on hard acceleration
« Reply #1 on: June 20, 2018, 12:44:45 PM »
Could have been doing a DPF regen?  When I had my glow plug control module replaced (which plays a key role in this process) it had like a white haze on acceleration for a bit immediately after (once it had warmed up) then it stopped and hasn't done it since as far as I can tell.  Just a thought.
Black 2012 E70 3.0 XDrive M Sport.  7 seats, & tiny 19" wheels.....

June 20, 2018, 03:15:17 PM
Reply #2

X5Sport

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Re: White smoke on hard acceleration
« Reply #2 on: June 20, 2018, 03:15:17 PM »
Get the DPF checked as you should not see smoke at all, and it is now an automatic MOT failure on DPF equipped cars.

If it isn’t regenerating every 300 miles or so (and/or you are doing short journeys) it will clog up.
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June 20, 2018, 04:28:51 PM
Reply #3

paulrog

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Re: White smoke on hard acceleration
« Reply #3 on: June 20, 2018, 04:28:51 PM »
I'm not sure it's anything to do with the DPF, I have Carly app and Bluetooth OBD device connected sometimes and I did a DPF Regen the journey before.

The Carly app shows the ash and soot levels are typical of a car which has done 87000 miles.

Plus the smoke was not blue or black, but very white.
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June 20, 2018, 06:31:12 PM
Reply #4

marti

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Re: White smoke on hard acceleration
« Reply #4 on: June 20, 2018, 06:31:12 PM »
White smoke is normally unburnt fuel...bad injector?

June 20, 2018, 07:04:37 PM
Reply #5

X5Sport

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Re: White smoke on hard acceleration
« Reply #5 on: June 20, 2018, 07:04:37 PM »
Has it been remapped?  Any sign of power loss?  Any sign of oil level drop.  Not all oil smoke is blue, fuel is more likely though.
:type: Never anthropomorphise computers. They hate that.

June 21, 2018, 10:03:22 AM
Reply #6

paulrog

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Re: White smoke on hard acceleration
« Reply #6 on: June 21, 2018, 10:03:22 AM »
No hasn't had a remap.

The car has full BMW service history, and apart from a replacement air con compressor, just normal services carried out.

Might be a sticking injector??
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June 22, 2018, 03:18:14 PM
Reply #7

marti

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Re: White smoke on hard acceleration
« Reply #7 on: June 22, 2018, 03:18:14 PM »
Chuck a full bottle of Redex in the tank...says for two tanks but whole bottle works wonders sometimes...