Smokey on startup

[Keksus]

Strange. I have checked my engine, everything beside the plugs is good, so logicaly thought that the plugs are fault. I will change the plugs shortly and will post if it changed.

[amacman]

is the smoke black from fuel or blue/white from oil ? maybe slight amount of oil in turbo . also check crankcase pressure/ vacuum as venting systems do fail .

[amacman]

Originally Posted by Farvs

With all the work done to the car it runs like a dream. I wish I could ignore it but is looks terrible - something you'd expect from a 20 year old banger, not an X5.

diesel is diesel , i would not own one unless saving ££££ on fuel . anyhoo i shall look into a supplemental hydrogen generator that will clean up your emissions .

[Farvs]

The EGR valve has been suggested as the possible cause on another forum I have posted. The advice was to give this a clean as apparently this can get pretty messy/oily and cause these sort of issues.

[Farvs]

Hoo-fuc£ing ray - sorted.


Turns out the problem was in fact two seperate issues that clouded (boom-boom) the issue. No. 1 was falutly injectors (BMW and Watsons both confrimed this). When these were changed the smoking stopped. Then appeared progressively over the next few months.

After a few more minor interventions the MAF was changed (No. 2). The olde unit gave some odd readings but, when changed, didn't cure the smoking.

I discussed options with the garage and I asked that the injectors be removed + checked. They were bench-tested and ultrasonically cleaned. In the process they noticed a greater build up of deposits than would be expected given their age/mileage.

So, the replacement injectors were fine but, after several week/months of running with a faulty MAF were affected with the result being the smoking caused by the deposits. Only after the MAF was changed AND the injectors were cleaned were the benefits realised.

The garage has been exceptionally good throughout and extremely reasonable about this last bill.

[amacman]

glad to hear that you got problem sorted . i still think you should consider using fuel system cleaner now and every 5000 miles and give it some welly on dry road as often as possible to blow out deposits .

[CrossyX5]

Hi did changing the MAF solve the problem, my X5 is smoking like a chimney on start up which it never used to.

Thanks
Crossy X5