Well, my issue all came down to a bad MAF (Have a new one on now - only a cheapie but will get a better one in the next month or two) I have also replaced the intercooler hoses (well 3 of them £30 from fleabay) fuel pump and filter (also have done the R5 thermostat mod - wow) and changed to Esso Synergy Supreme+ diesel. Now have warm, quiet running relatively economical car. What a difference. I'm smokeless too! I can also recommend regular doses of Millers Oils (I went through 2 bottles in 3 months) to clean out the system and injectors.
tyrefitter
Active Member
Was going to do this mod myself but found a post on here somewhere that didn't recommend it if you tow big trailers well I tow 1500 kgs with our caravan so I'm now undecided what to do apparently it causes overheating whilst towing
Did you ever find the resolve to this. I'm currently the same. Not all time but some reason doing 2k slightly pressing pedal you get a chuffing and juddering from engine and what best describe is grey smoke. Just as you describe above image changed pcv filter changed boost hoses inc one at back of turbo. Really weird as its fine for a while like do a 15 20 mins drive then it suddenly start. Once left for a bit and cooled it runs fine again untill it starts doing it again. I'm getting answers from everything ti turbo seal gone to injectors or fuel pump on way out
Nodge68
Well-Known Member
I reckon it was something to do with the crankcase vent causing contamination of the intake air. I didn't check for this, and sold the vehicle when the gearbox failed and the FL2 came along.
Yeah I checked it, it had the upgrade mod on it I've replaced rhe rubber seal in tip of cap. I did have a crack in the lid of the rubber seal side but I glued it back for now. That's what I seem to also come back too tho it got be sucking hard some reason and sucking more oil into the the breather. I'm just at a loss and stuck in the lakes away from home even left my reader at home so can't check codes
Nodge68
Well-Known Member
If by upgraded mod you mean the BMW cyclone separater, then it's not an upgrade at all, just a way of eliminating 1 more item from the maintenance chart. The cotton reel filter is much better at capturing oil, which would otherwise pass to the intake system. The cyclone separater allows more oil through, along with combustion byproducts, which is what I believe is causing the 2k misfire and blue smoke. Under normal running it's not an issue, as the amount of fresh air in relation to contaminated air is large, but when holding the throttle at 2k off load, there's little fresh are coming in, so the amount of contaminated air is large.Yeah I checked it, it had the upgrade mod on it I've replaced rhe rubber seal in tip of cap. I did have a crack in the lid of the rubber seal side but I glued it back for now. That's what I seem to also come back too tho it got be sucking hard some reason and sucking more oil into the the breather. I'm just at a loss and stuck in the lakes away from home even left my reader at home so can't check codes
One test I didn't do was to allow the PCV to vent into the atmosphere, with the connection to the turbo intake plugged.
A BMW driver would never notice the 2k misfire, as the ECM prevents the engine running above 1800 RPM off load, same as most other German diesel engines.
So plug the hole. Let the pipe hang down and try replicate my circumstances to see if the issue is persistent. I'll also try get hold of new orignal filter for oil breather
Nodge68
Well-Known Member
Disconnect the PCV connection at the turbo intake, and allow it to vent to the atmosphere. The plug the hole in the turbo intake to prevent air bypassing the MAF. Then see if the 2k misfire still happens. My theory is it won't, but I'd like to have the proven or disproven.
The BMW mod was for BMW cars, but they run a completely different ECM, with a different set of parameters, so the 2k misfire would probably never come up.
Well I'll give it a trip to gym again in morning..it's 12 miles there and then 12 back today issue happened just after fully completed journey day before I got 2 miles from gym and issues started so once it stops raining here I'll pull pipe and get it plugged and let pipe vent and I'll report back
So today took.it for a ride with the set up u suggested to check for breather issues. To be fair seemed to drive a bit smoother or could been in my head.
Drove alright again for a while stopping at parts store then back on road again then magicly 2 mins from gym about 11miles in bam it started I pulled up at a garage around the corner to ask how much to pull codes and once I got back in car as he said he couldn't help and started up issues gone.
This has me thinking
gonna try on way home after a swim if it starts and I stop engine for a few mins and start it and it go away it possible a sensors or somthing possible lose wire maybe or still maybe injector or injector due to wiring Stumping me but I can't really afford to blow 80 quid one someone just to pull codes
I really need never let mine out my site
teddywood1
Well-Known Member
What make of maf sensor have you put in
I'm coming down to sensor as on way back it started so I did science. Once it started I would stop take keys out leave it 5 seconds and start again. Done this a few times.
I've even seemed to figure out how to replicate it every time.
So I'm diving along and I'm just in slightly higher gear than needed so you give it a extra boot to bring it up rather than changing down and back up again and all is OK till you then let off the pedal and do the 2k as seen in video and bam smoke and hop. Again stop car it clears so I dod try 1 more time and took off in 1st and moved to 2nd too early and put foot to floor and I got the ! Eml (first time) which then cleared once I stopped and started worked as if no issue untill you try to do the too much power in too a high gear at too low speed
If that makes any sense I'm still trying to locate code reader local.to me but seems no one
And it's a boshe fancy non ebay Chinese real one going to give all plugs a clean now with vontact cleaner
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andyfreelandy
Well-Known Member
Sounds like corrosion on high pressure fuel rail sensor connector to me.
