ggweci
Go Kart Newbie
- Location
- Toronto area
I'm getting 7-7.5L/100km (31-33mpg) on my 2019 Rabbit doing mostly highway (80/20 split I'd guess). Very happy with that, but I haven't really been pushing the car as it still only has 3500km.
7
GTI Rabbit mpg
- Thread starter videoguy009
- Start date
GroceryGTIer
Drag Racing Champion
- Location
- Tri-state
I was told years ago, that resetting the ecu, can cause it to run too rich or lean initially and could burn them out much faster.
sean.mason.75873
Banned
Mine was actually running leaner after reset and progressively got richer until I'd lost 5 mpg and the car was struggling to accelerate. Did the same after picking up new.
Also the fact they're on backorder leads me to believe my car isn't some isolated incident.
Sent from my SM-G970U using Tapatalk
Last edited:
Strange Mud
Autocross Champion
- Location
- Small Town CT
- Car(s)
- Assorted
Sean,
know from logging or? just curious
Jim
know from logging or? just curious
Jim
GroceryGTIer
Drag Racing Champion
- Location
- Tri-state
Idk, I was troubleshooting an issue on my last car and I had said something about doing a reset, and was told to be careful about doing it too much, as the computer may start out lean or rich and those stupid things can get thrown out of wack and screw up.
sean.mason.75873
Banned
I know from the car progressively get worse and worse gas mileage and struggling to accelerate after a few hundred miles from delivery and after reset.
No logs.
Sent from my SM-G970U using Tapatalk
sean.mason.75873
Banned
The ECU will start at the same afr everytime you reset and then adjusts fueling based on afr's. It does this pretty quickly.
Who told you this?
Sent from my SM-G970U using Tapatalk
GroceryGTIer
Drag Racing Champion
- Location
- Tri-state
I don’t recall right off the bat. I believe it was a local shop, a reputable one though. This was also for an mk6 too.
sean.mason.75873
Banned
Well, I think that's complete and utter nonsense.
Sent from my SM-G970U using Tapatalk
Sent from my SM-G970U using Tapatalk
GroceryGTIer
Drag Racing Champion
- Location
- Tri-state
Well, I think it’s nonsense that suggesting “resetting” the ECU somehow will completely erase a problem. These cars ECUs are highly sophisticated, and resetting the ECU really does nothing except make a problem go away for a short period of time, otherwise codes would stay gone. Perhaps your o2 sensor was already bad... maybe it was something else, but I’ve got a 2019 and have had zero issues with mpg over 7300 miles.
Stop acting like you know everything and just accept when someone may be trying to assist you in finding an issue to your problem.
sean.mason.75873
Banned
The problem existed before the ECU reset. I did the reset because it resolved some people's stalling issue, which I also had, as well as poor mileage and bogging under acceleration.
So it's highly unlikely an ECU reset caused an issue that occurred prior to it being reset.
If you want to think you kept your car from having issues by doing nothing to a car that wasn't having issues, go ahead, whatever floats your boat and makes you feel better.
Sent from my SM-G970U using Tapatalk
Last edited:
Vorne Au hinten Weh
Passed Driver's Ed
- Location
- Great White North
O2 Sensors
If the pre-cat sensor is defective then keep an eye on the post-cat 02 sensor. If the fuel mix is off for weeks then the post-cat sensor may very well get overheated repeatedly and have a very short lifespan after replacement of the pre-cat sensor. Or even fail before replacement of the pre-cat sensor.
If the pre-cat sensor is defective then keep an eye on the post-cat 02 sensor. If the fuel mix is off for weeks then the post-cat sensor may very well get overheated repeatedly and have a very short lifespan after replacement of the pre-cat sensor. Or even fail before replacement of the pre-cat sensor.
jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
Thankfully the 18 didn't suffer from all these problems.
sean.mason.75873
Banned
I'm in a loaner now, so hopefully the second sensor will be ok.
I'm hoping, but not convinced yet, that the bad sensor was the cause of my issues and not just a casualty of whatever's going on with the 2019's.
I drove the 2018 tonight, it's nice to have a smooth driving car that hits 35 mpg cruising up the highway. My son takes it this week, I'll miss her.
Sent from my SM-G970U using Tapatalk
sean.mason.75873
Banned
The O2 sensor wasn't causing the poor mileage. Car continued to get poor mileage after replacement.
My rough idle, poor driveability, and poor gas mileage resolved when the dealer switched my car to 5w-40. Averaging 34 mpg per tank now, up from 28 in light mixed driving.
They claimed there's a service bulletin for it, but no one has been able to get a copy.
Dealers are also telling customers that an ECU update is coming for the 6spd cars with stalling issues.
Sent from my SM-G970U using Tapatalk
My rough idle, poor driveability, and poor gas mileage resolved when the dealer switched my car to 5w-40. Averaging 34 mpg per tank now, up from 28 in light mixed driving.
They claimed there's a service bulletin for it, but no one has been able to get a copy.
Dealers are also telling customers that an ECU update is coming for the 6spd cars with stalling issues.
Sent from my SM-G970U using Tapatalk
Last edited: