All Things Mk5 > How to Guides / Troubleshooting
Edition 30 smoking on boost
GTI5:
--- Quote from: Ashley g on September 18, 2012, 08:42:54 pm ---Cheers for the replies! This is definately 100% not always smoked on boost which is why I'm worried and thinking its maybe turbo related? Any thoughts?
--- End quote ---
A richer mixture is likely to be safer for the car by lowering combustion temperatures and since its remapped it will be running hotter. Mine also emits black smoke occasionally (Stage 1 and pre cat delete only) as well and not always at WOT when accelerating.
alexperkins:
Before my new sparks, I could puff nice clouds of black smoke on WOT if I hadnt given it a blast for a while (its stage 2)
Ashley g:
Like I say though, it definately hasn't always done it! It's something that has recently started. It can't just suddenly start running rich, I mean a map can't just change?
I'm going to remove the plugs later and check them. Hopefully they won't be oiled up.
I'm sure it's started happening since I changed the oil and filter with Castrol Edge FST 5w30 or make just a coincidence?
alexperkins:
My map failed spectacularly after a battery blip and I had massive running problems
Id say thats a coincidence - to be sure, you have checked the oil level etc?
Ashley g:
Ok, so this afternoon I removed the downpipe from the turbo, and checked for play, and there was none. No sign of oil on the exhaust side either, just black and sooty. Then I removed the jubilee clip from the intercooler hose in the passengers side and there seems to be a fair bit of oil in there which dripped out.
Checked plugs, seem to be the right colour and not oiled up.
It seems that the pcv valve is letting oil down into the intake manifold which I'm sure may be the cause, but the pcv is new!
I may try a catch tank to eliminate the problem. Checked oil too and it has hardly used any at all, still on max level.
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