Kia sorento 2.5 cdri egr problem

black smoke is over fuel and in a diesel with a turbo that indicates that
1 the turbo variable vanes are not adjusting to low rpm
2- the turbo turbine wheel is not spinning up
3-the intercooler or hoses are leaking boost air
4-- bad injectors -- squirting and not atomizing

Have someone recheck the car

loads of black smoke, loss of power and heating all indicate a faulty turbo--not winding up to provide the air flow required
check turbo actuator got the turbine vanes
Take it to a turbo repair shop and have it tested.

Check:
1. EGR Valve
2. Turbo
Do you have a lot of smoke?
If yes, what colour?
- bueish, white or black (very important to find out the problem).

Black smoke = excess fuel. Could be o2 sensor, blocked fuel pressure regulator etc... should have vehicle scaned they may be able to extract a code, if not a fuel pressure test would be good to

When was the last time you change oil? This must be applied every 6 mos of depend on how you use the car. If you already had change oil. Your CDRI have a problem.
a. pump pressure Don't attain the desire level
b. Fuel filter
c. Check your SCV (Suction Control Valve) you may clean or replace Use carburetor Cleaning Spray
d. EGR ( Exhaust Gas Recirculation ) if your engine equip with it.
e. Fuel Injector is Dirty
f. Check your water separator
Hope this will help you to eliminate your problem.

i would check all the basics like spark plugs and check for vacuum leaks around the intake manifold.With a can of 2+2 carb cleaner while engine is running --if idle goes up or down that is were your leak is--
check egr too, Lee

Sound like you are looseing some boost from your turbo,check all your hoses from your turbo,if all of them are ok you may have a waste gate sticking, you need to check for movement there it only move very little but has alot to do with hp.Thanks And I hope this helps you

on my sorento same problem and its solved vacuum pump on turbo, now ok, sorry for bad english, vacuum membrane is broken

Hi, I have a 2.0HDI Expert which was doing the exact same thing as yours, blowing thick black smoke, sluggish and loss of power on gradients, a hissing sound and surging. I replaced the air flow meter but that didn't help. I was told to replace the turbo but a turbo expoert told me not to as it would blow white smoke if it was faulty. I was then told to replace the injectors but a diagnostic test showed them to be functioning fine. I was then told to look at the intercooler which had thick sludge at the lower left pipe. I replaced it today - Sunday 12th July and it is now driving like a new van. It now pulls me up gradients with ease in 4th and 5th instead of having to drop gear to get to the top. I got a replacement from Euro Car Parts for £147 inc VAT. To tell if this is your problem, look through the gaps in the lower section of the bumper at what looks like the radiator and look for sludge over the inside of the bumper and all over the pipe where it joins the back of the radiator (intercooler). Also open the bonnet and look down behind the grille for the same sludge. Hope this sorts it for you. Barry, Newtownards, Northern Ireland.