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Welcome to the forum.
You are certainly on the right track.
There is a solenoid valve that controls the vacuum to the EGR actuator - the EGR being open at idle will most certainly make it rough - track the vacuum line from the EGR and it should lead you to the solenoid.
Hi, I found this forum last night, and spent two hours reading to get some ideas, about my 2000 Sedona 2.9TD which was running badly and putting out clouds of black smoke, when the engine was under load.
Today I checked air filter, Intercooler for blockages, hoses around the turbo for splits etc.
Then I found the cause and a cure.
I blanked off with a piece of sheet aluminium, the hose that comes out of the EGR valve and goes into the inlet manifold. She now runs beautifully, loads of power and no smoke.
I appreciate that the 'proper' thing to do was to go down the road of replacing the EGR valve, then if that didnt work look at replacing the solenoid, then look into the ECU to see if it was sending the right signals to the solenoid etc etc. but my way seems to work a treat, and cost me less than a cup of tea.
I hope this helps somebody out there with a smokey Sedona.
My Sedona 2.9TD 2000 also has black smoke and poor acceleration.
I've changed the fuel, oil and air filters plus full oil change, tried redex in the diesel and then fuel injector cleaner, all to no avail.
My last resort is to blank off the egr valve but as a complete novice could someone advise me whereabouts this should be blanked off?
I've located the EGR valve assembly which has two bolted sections, one of which is underneath and I can't get to with a spanner.
The other section (located on the side) has a rigid metal hose attached to it that comes out of the EGR valve assembly and round into the intake manifold (not sure of the air flow direction though??)
Could anyone advise where the EGR should be blanked ie at the valve end or at the intake manifold end as I don't have a clue (please please don't tell me it's the one underneath the valve that needs blanking otherwise it's another trip to the Kia garage ££££
Any diagrams labelled so an idiot can understand them would be extremely appreciated.
Norm, just undo the rigid metal hose that runs round to the inlet manifold at the EGR valve end. fashion a blanking plate out of a thin piece of sheet metal (someone on here used a coke can). My mechanic used a sheet of cardboard on a Shogun which worked long enough to prove the problem before it burnt through !) Just slip it onto the two bolts, then rebolt the hose up. Dont touch anything underneath the valve.
Once you have removed the air filter box etc so you can get at it, it should take all of about 5 mins, and no money.
Once I did this this I revved the engine and still got clouds of smoke. I feared it hadnt made any difference, but that must have been soot built up in the exhaust, because once I drove the car it was fantastic.
Doing this, transformed my Sedona. I hope it does the same for yours.
Right move. All the EGR system does is introduce dirty hot exhaust gas back into the inlet manifold to reduce emissions at cruising speed. Diesels do not like hot dirty air, they like clean cool air that's why they have an intercooler. I blocked the EGR valve off on my O3 Sedona and cleaned the 100ks worth of black treacley goo out of the inlet manifold. You want to clean the intercooler as well if a high miler and change the oil, oil filter and air filter about every 6000 miles.
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