EGR will give what we call blue smoke when startingfromcold first thing in the morning and usually runs lumpy for a couple of minutes not wanting to rev up.Also when you go to pull away from stationary it will have a lag when you put your foot down and then when at about 2000 revs when turbo cuts in will fly away.This is because if EGR valve is leaking there is not enough oxygen to combust fuel properlyuntilturbo boosts more air.If it is real black smoke points to leaking injector(s). Have you changed the air filter as you have not mentioned that.

 

It could be the EGR valve. My last car had a sticky valve, it would sometime stick wide open. This produced a huge amount of black smoke and very little power. It depends where it sticks, wide open = more exhaust gas and less oxygen in the combustion chamber which in turns leads to the power loss and smoke I used to experience.

 

hi,doing air filter in the morning.is there a kia test for checking the injectors?would it show upon diagnostic check?thanks kev t

 

You would need an injection specialist to check them,your OBD will not show if injector seats are leaking.

 

hi all,is it major surgery to remove the injectors?im thinking worst case here.any ideas on a rough price to get them refurbed?thanks kev t

 

Hi you need a leak off test doing on the injectors to check them out. I have just had mine done at a local garage at a cost of £27. Better to get them checked out before you start disturbing them. Dave

 

Check your engine oil level as well. If the injectors are leaking into the bores, and then to the sump, it will gradually fill up and could lead to the dreaded "runaway", when the sump fuels the engine and it will not stop until the sump us empty or the engine blows. See Youtube for a number of videos.

 

hi all.what is a leak off test for the injectors?ta kev t

 

had mine tested, within 5 secs 1 leaked off tonnes, had the injector tested and refurbed @ £220... ouch.

 

Had the same issue with mine and it turned out to be a split on the inside wall of thr braded turbo pipe, cost £60 for a new one.

 

thanks for that soldier.my kia dealer reckons it could be something to do with the intercooler or pipework involved with it.hope to get it sorted soon.not a happy camper when car not right!!!!lol.ta kev t

 

No probs, had the dealer telling me it was alsorts, it's easy to check, it's the large pipe you can see to the left of the battery, if its oily on the outside there is a good chance it has perished on the inner. Good luck, Lee

 

evening all,another twist in the black smoke saga.spoke to friendly kia service manager and he said check the intercooler.quess what!!!!half the fins are missing and there appears to be an oily residue where there missing!!!!!!bingo!!!i hope.have bought a gaurenteed cooler for£73 delivered and hopefully get it fitted on friday!will keep you informed.thanks all. kev t

 

Hi All. Many Thanks for all the advice, and for pointing me in the right direction. My 2006 Kia Sorento was having the same problem as Kev T's (In fact, when I read Kev's Question I thought it was me talking!). Have taken it in and it's the Intercooler Pipe which has split apparently.Should be fixed within the next day or two.