W211 OM642 smoke on idle query

[h4r7l3]

Hi, I have the following issues since doing the modifications to my car, when idling and then pulling from a junction, once the car is up to temp the car will have white smoke coming from the exhaust, not a mass amount but a small amount that is noticeable. It hadn't done this before the following modifications and maintenance that I had done to the car:

- Hybrid Turbo from the original turbo, so changed from the original GT2056V to a billet wheel, machined internally etc.

- EGR Programmed out of the system, blanks fitted at the back of the system that goes into the Y-Piece on the exhaust

- Straight through exhaust setup, removed the small turbo Silencer/CAT and the bottom of the downpipe CAT

- Fitted a spacer for the oxygen sensor, only one with a temp sensor after the Large CAT

- Upgraded Intercooler and removed the baffle out of the intercooler resonator at the front (Plan to change this plastic resonator with a metal piece with silicon hoses)

- Remap taking the car to 318BHP and 575ftlb Torque after these modifications

I have just Replaced the PCV valve with a new one and a new hose and clamps which did have abit of oil and crud in there which I believe maybe the issue.

Anyone else have any other recommendations? MPG is fine 35-40 plus on 12 mile commute each way to work between motorway/ring road and city driving.

The only things I haven't checked, besides fitting the new PCV valve yesterday, is the Glow plugs (Which are only a year old and have done about 10k miles) and injectors. What would be the best way to check the injectors without taking them off if this could be the culprit?

Instagram: @hartle93 for the car with dyno run print sheet etc

 

[LostKiwi]

White smoke is incomplete combustion.
Can be many things - bad injectors, injection timing, low compression....

 

[h4r7l3]

White smoke is incomplete combustion.
Can be many things - bad injectors, injection timing, low compression....

What could I do to check timing? I have access to Snap On Diagnostics?

 

[M80]

An over fueling remap??

 

[h4r7l3]

An over fueling remap??

Was doing it before the remap, sorry didn't clarify that

 

[LostKiwi]

An over fueling remap??

Over fuelling gives black smoke.

 

[Doug1234]

The new pcv valve did you test it before fitting ? , just apply suction on the outlet that goes to turbo and make sure it closes off internally.
My Jeep with same engine would lay down a smoke screen to cover both lanes for hundreds of yards after constant 15-20 minute tick over and a new unit cured it instantly.
I have had a bad glow plug that gave no warning light and the glow light behaved normally as well ,only indication it was bad was a slight puff of smoke in the morning.

 

[alexanderfoti]

Does the smoke smell sharp and burn your eyes? Then it's unburnt diesel in atomised form. Its like due to an injector that has a poor spray pattern or is dripping.

If it smells like oil, then it's oil.
check turbo, pcv etc for excessive oil.

 

[h4r7l3]

Does the smoke smell sharp and burn your eyes? Then it's unburnt diesel in atomised form. Its like due to an injector that has a poor spray pattern or is dripping.

If it smells like oil, then it's oil.
check turbo, pcv etc for excessive oil.

I have just changed the PCv valve for a new one, replaced the hose aswell and make sure the clips were on.

I have been reading but would blanking the EGR pipe that goes from where the EGR is to the Y pipe of the manifold cause an issue as no codes have come up and I know the B60 exhaust pressure sensor is near the EGR valve on the crankcase?

 

[h4r7l3]

White smoke is incomplete combustion.
Can be many things - bad injectors, injection timing, low compression....

Is there anyway of checking them with diagnostics machine or anything without having to take them out and send for testing?

 

[alexanderfoti]

Is there anyway of checking them with diagnostics machine or anything without having to take them out and send for testing?

Not for dripping

Yes for cylinder contribution, by checking injector adjustment values on star etc.

 

[h4r7l3]

Not for dripping

Yes for cylinder contribution, by checking injector adjustment values on star etc.

Does it have to be a star? As I have snap on diagnostics available to me

 

[LostKiwi]

Does it have to be a star? As I have snap on diagnostics available to me

You'd need to check in the live values it can display.
Most of us here use Star (especially indys like Alex) or iCarsoft and don't have Snap On readers available.

 

[h4r7l3]

You'd need to check in the live values it can display.
Most of us here use Star (especially indys like Alex) or iCarsoft and don't have Snap On readers available.

I had a thought on the turbo oil seal I put on was a paper style one instead of a metal one? Could this be a turbo oil seal failure as it never smoked before I did this work?

With the bonnet open looking where the downpipe to turbo is when I rev it, there is a small amount of smoke which leads me to think it is the poor turbo seal I was supplied with when the turbo was upgraded, should've bought an OEM one instead of saving £15 -_-

 

[LostKiwi]

Sounds like you're talking about the oil return pipe seal in which case it makes no difference. The smoke you're getting is white so incomplete combustion as opposed to blue (burning oil).

 

[h4r7l3]

Sounds like you're talking about the oil return pipe seal in which case it makes no difference. The smoke you're getting is white so incomplete combustion as opposed to blue (burning oil).

So would more then likely be injectors? Is it going to badly damage my engine?

 

[h4r7l3]

Injectors are fine, no codes coming up and no issues with powe etc and not losing oil so I'm going to take the turbo back under guarantee to be checked over

 

[LostKiwi]

It is unlikely to be turbo as at idle it's not doing anything.

 

[mersum1es]

yep exhaust pressure sensor must have connection open, but I think you would get a fault code if your blank falnge is at 'wrong' place

Early OM642 Timing cahin can be checked via oil filler hole

Car is remapped, that may cause injectors have situation where pre-injection is causing troubles (or just a bit worn internals). They won't throw code easily.

 

[h4r7l3]

It is unlikely to be turbo as at idle it's not doing anything.

It's only done it since fitting the new turbo, what other way can be done to check to see if it is injectors?