carbon buildup NX runs too rich
07-02-17, 05:17 PM
#1
Driver
Thread Starter
carbon buildup NX runs too rich
HI,
The NX has significantly more carbon buildup on the tailpipe than all other cars from that same year and milage.
This car runs too rich!
Is there a tuning to turn this righ mixture setting down a little bit so that I don't have to clean my exhaust tail pipes every freaking week!?
I drove like a Grandma (under 90 kph) for a week and it make no freaking difference, I don't idle more than 30 secs (red light).
For a comparaison, my neighbor owns a HONDA CR-V with a TURBO and I can't see any signs of carbon on his pipe at all! Also, If I go to a used car parking lot, the NX standout right away for the carbon buildups
The NX has significantly more carbon buildup on the tailpipe than all other cars from that same year and milage.
This car runs too rich!
Is there a tuning to turn this righ mixture setting down a little bit so that I don't have to clean my exhaust tail pipes every freaking week!?
I drove like a Grandma (under 90 kph) for a week and it make no freaking difference, I don't idle more than 30 secs (red light).
For a comparaison, my neighbor owns a HONDA CR-V with a TURBO and I can't see any signs of carbon on his pipe at all! Also, If I go to a used car parking lot, the NX standout right away for the carbon buildups
Last edited by Lazerboy; 07-02-17 at 05:24 PM.
07-04-17, 12:51 PM
#5
Driver School Candidate
07-04-17, 03:50 PM
#7
Driver
Thread Starter
Its worse... I tired. I just hope its not a engine problem where they designed the piston smaller for better fuel economy but engine oil leaks out as a consequence. 
Long terme this will clog up all your valves and ports no matter how you step on that pedal.
Long terme this will clog up all your valves and ports no matter how you step on that pedal.
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07-07-17, 07:09 PM
#8
Driver
Thread Starter
Tiguan 2016 Odometer at 15,000km
The Toy Yaris is a 2008 with NO CARBON DEPOSIT, Zilch!
07-07-17, 07:13 PM
#9
Driver
Thread Starter
I also tried using the same gas station and fuel on both cars (Using 87 octone on NX) , NX end up spewing carbon no matter what.
Tiguan looks worse in the pictures. But dont forget they got the Diesel gate scandel for it.
Tiguan looks worse in the pictures. But dont forget they got the Diesel gate scandel for it.
07-07-17, 09:22 PM
#10
Also, the NX needs 91...don't run 87, just going to dump more fuel in to counter knock, more soot.
Anything else you'd like to complain about today?
07-07-17, 10:16 PM
#11
Intermediate
My NX and my Audi Q3 show signs of soot in the exhaust pipe as they are both 2.0 turbocharged engines.
This normal soot from turbocharged engines has been a cause of concern for some prospective buyers, so now many of the manufacturers are placing pristine, but only decorative exhaust outlets at the rear of the car while the actual exhaust pipes are pointed downward forward of the aft bumper.
It looks kind of funny on cold mornings when the steam is rising from under the car. Some love the pristine, but "fake" exhaust, others hate it and won't buy the car because of it.
This normal soot from turbocharged engines has been a cause of concern for some prospective buyers, so now many of the manufacturers are placing pristine, but only decorative exhaust outlets at the rear of the car while the actual exhaust pipes are pointed downward forward of the aft bumper.
It looks kind of funny on cold mornings when the steam is rising from under the car. Some love the pristine, but "fake" exhaust, others hate it and won't buy the car because of it.
07-08-17, 05:08 AM
#12
Pole Position
I also question whether this is really a fair comparison. You are comparing two vehicles with decorative chrome exhaust tips against one without. You might be surprised at how much soot is visible on the Yaris if it had a chrome exhaust tip. My last two naturally aspirated (non hybrid) engines had some similarnsoot that I always had to clean off when I washed the car. Currently, neither of our hybrids have decorative tips so I can't offer any current comparison.
07-08-17, 05:42 AM
#13
Driver
Thread Starter
Uh no...it's a result of being a turbocharged engine. They typically run richer at WOT for the cooling effect of the extra fueling to prevent knock compared to a naturally aspirated vehicle. The more aggressive they are with boost, the more fuel, the more soot. It is NOT oil, it is carbon build up from a rich fuel burn.
Also, the NX needs 91...don't run 87, just going to dump more fuel in to counter knock, more soot.
Anything else you'd like to complain about today?
Also, the NX needs 91...don't run 87, just going to dump more fuel in to counter knock, more soot.
Anything else you'd like to complain about today?
What do you mean? I dont force people to read me posts
Last edited by Lazerboy; 07-08-17 at 05:47 AM.
07-08-17, 06:59 AM
#14
07-08-17, 07:01 AM
#15
if it is too rich...I have melted/blown up 2 out of 3 catalytic converters in a different vehicle because of rich/excess fuel and the cats that got destroyed ended up getting sucked back in my v8 and blew half my cylinders...was a very expensive fix but happened under warranty...so imo this is important topic due to my past experience w/different auto.