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hyundai getz diesel

10K views 71 replies 6 participants last post by  dirtyleeds 
#1 ·
ok so this has happened twice within the year, both months apart.
start it up, and it just loses power and pours loads of black smoke from the exhaust. leave it for 5 to 10 minutes and all is ok.
I know it's random but Mrs wants me to put some thought into it.
maybe a random EGR valve sticking?
it's mechanical - no wiring to it whatsoever, would I be better to remove it and blank the holes?
or any other thoughts appreciated.
primarily thought of the EGR as it usually does short journeys and maybe more clogged up than a normal drive.

thanks in advance
 
#5 ·
Normally the alloy side, easier to seal
If it was blocked solid, then no issue, but exhaust gases, can get through small gaps, so its not really blocked, the higher the revs, more pressure, and it lifts it slightly allowing gases back through.
You will get a lot better response off the accelerator blanking the egr off...
:grin2:
Make sure the metal you use is thick enough.
Have seen some blanking plates, actually burn away....
 
#7 ·
No, you have read that wrong, the egr running puts soot back in the engine, not the other way around
Exhaust Gas Recirculating (EGR),, it recirculates the waste gases, back into the inlet manifold to be reburned, with fresh air and fuel, so it becomes a vicious circle.
That is what damages the engine...
You will never notice the running temperature, that is controlled by the ecu, from monitoring the engine temperature sensor, this in turn will start your fan.
If a viscose fan, this will do the same...
Have blanked too many off on different cars.
The only ones that give issues are the electric controlled egr.
But even these can be fooled Lots of FFFF's in the ecu map ( egr delete)
 
#8 ·
Got a photo of the EGR on your motor?

Re temperatures.
The convention is that without the EGR, higher combustion temperatures are reached which can potentially damage injector nose, piston tops and valves/seating.
Being as the EGR is firmly closed at higher revs when engine temps will be hottest, I'm not convinced that convention is right.
 
#9 ·
My Clio DCi as had the EGR disconnected for 36,000 miles no problems
most likely why it as the cleanest oil I have ever seen in a Diesel.
 
#12 · (Edited)
Ta.
Just checking as Hyundai also seem to do an electric version.

If plate allows, between the EGR and the inlet manifold or between exhaust connection pipe and EGR
That way EGR is in place but it doesn't matter if open or closed.
Removing EGR, both holes that are left need blanking.

But try what I said earlier.
Many of this type operate from a solenoid valve in the vacuum pipe. Unplugging that stops the EGR from opening.... blanked for free.
 
#14 ·
The problem may be the valve that controls the vacuum,
a small ball bearing blocking the pipe may fix it.
Well it will disable the egr without messing with
blanker plates.
 
#18 ·
Easiest and cheapest option.
and taking the plug off may though a fault light
or even go into limp home mode.

Though I do suspect the solenoid valve is the real problem.
 
#17 ·
If the cause of your black smoke is from this, the only issue, gases can still escape,,.
Have you thought about taking it off,. Cover in oven cleaner, just the lower section, half way down the internal rod, no higher, as there is a rubber diaphragm inside the top dome part, leave 15/30 minutes, rinse off, and refit..
 
#27 ·
Pull the rubber pipe off the egr, shove a ball bearing (must be a tight fit to seal and block pipe), then push blocked pipe back onto egr. Job done and it'll take 2 minutes to do.
Just as easily use a 20p food bag clip to crimp and therefore block rubber pipe.
Any of the above will stop the vacuum effect opening the valve on the egr.
HTH
 
#21 ·
Right take off the rubber vac pipe on the egr and block it,
if that cures it then the real fault is likely the solenoid valve
that DD mentioned, but take off and block the pipe first as
a test.
 
#22 ·
The vacuum is coming down the pipe the egr is the bit that's being sucked on
so with the pipe off the valve remains closed.
 
#24 ·
thanks again guys, sorry for being a bit dim on this subject.
ok, i'm taking i for a 17mile drive to work, about half down the M11. I'll take the pipe of the EGR valve and block it with a screw and tyrap.
then I'll report back prob on friday after the Mrs has done a week of short journeys and see how it's got on.
have a good week!
 
#26 ·
If it were mine I would stick something a small ball bearing
up the pipe to block it and far enough so you can get
the end back on the valve then no one will be any the
wiser, but it's not mine so up to you.
Our's feels the valve could still lift I have not come across
this but Ours has vast experience and I for one would not
doubt what he says, so If that worries you you will need
to find out why the egr seems to be opening at the wrong
time I would suspect the solenoid valve that controls it
but it's not a sure thing. or fit a blanking plate.
 
#29 ·
Are there any wires going to the EGR if so then it's likely it's on due
to the pipe being disconnected, putting the system back to org will
likely turn off the light but it may take a few runs like it did to turn it on.
It's looking like the blanking plate is the way to go with the pipe back
to org.
 
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