You have a cracked DPF.Just got the car back from the dealer said it was fixed. Logged on the way home using vcds and the temps look a tad hot but I cant complain since I havent logged a VW before. Just pulled in the drive and ran a scan of the car and it came up with an error about the EGR.
1 Fault Found:
001025 - EGR System
P0401 - 001 - Insufficient Flow - MIL ON
Fault Status: 11100001
Fault Priority: 2
Fault Frequency: 2
Reset counter: 255
Mileage: 246784 k
Time Indication: 0
RPM: 1656 /min
Speed: 84.0 km/h
Voltage: 13.98 V
Load: 95.7 %
Load: 100.0 %
Mass Air / Rev.: 370.0 mg/str
Mass Air / Rev.: 390.0 mg/str
Not sure how to feel about this car runs good so might just let it go for a while
Turns out it was the fuel filter. It wasn't quite due to be changed but putting in a new one solved the problem. Starts like normal again.Sounds like your battery may be on it's last legs. Even if it tests out as ok, it may not be quite enough for the power these cars pull on start up. I'd start there, especially since "winter is coming".
I'm very confident that if you monitored exhaust gas temperature (EGT) you'd find that the lurching and hesitation are accompanied by spikes in EGT. I'm convinced it's the shorter NOx regens that are causing what I call herky-jerky behavior. There is also what some people have called "hill cresting flutter" or "stutter", that is caused by de-fueling under light throttle and light load. If you add that to the NOx regens, you can get some moments of very rough responses from a fixed TDI.Another issue: When i'm cruising in 3rd or 4th gear and neutral throttle (neither accelerating or decelerating) the car lurches and hesitates like someone is tapping on the accelerator pedal to the beat of a song.
Dealer says since there is no codes/lights for warranty they won't help me unless I pay their diagnostic fees
I thought at first it was related to a dpf regen since sometimes it acts weird right before and during regenerating. Still happening 2 regens later and it's getting really annoying. Any ideas?
I agree. After the fix I drove my car around with the Torque app running and saw a large increase in short regens. Depending on your speed you could notice some jerking if you are at the lower RPM range of the particular gear that you are in. IMO VW tried to adjust for this be raising the shift RPM's slightly. The higher the engine RPM's the easier the engine will be able to burn the extra fuel being pumped in by a regen. Unfortunately all of this means lower MPG's....I'm very confident that if you monitored exhaust gas temperature (EGT) you'd find that the lurching and hesitation are accompanied by spikes in EGT. I'm convinced it's the shorter NOx regens that are causing what I call herky-jerky behavior. There is also what some people have called "hill cresting flutter" or "stutter", that is caused by de-fueling under light throttle and light load. If you add that to the NOx regens, you can get some moments of very rough responses from a fixed TDI.
Fix done Spring 2018. I'm now at about 138k (12k post-fix) and I've had nothing but issues.
Immediately noticeable was a lag in power.
Fuel economy was down a bit as expected.
The larger issue was a shutter at highway speeds that began as an occasional flutter and become a regular hesitation that built up to the point of my car going into "shutdown mode" on the highway less than 2 weeks after the "fix". Not a fun experience with kids in the car.
Towed to dealer where they replaced several emissions-related parts (including the DPF).
SIDE NOTE: At time of fix I had a major service done including timing belt. Bye-bye VW kick-back.
I've since had the clutch replaced and things seemed fine.
BUT then the DPF light came on (something that I'd only seen ONCE in the first 125K of driving this car ... I drive 70 miles one way to work) ... This time, the DPF light didn't clear and it wouldn't regenerate. At this time the engine was idling SUPER rough even for a VW diesel ... teeth-rattling.
Back at the dealer they also could not get the DPF to regenerate until they drained the fuel (which they claim was bad) and put in "good" diesel fuel. (I've used diesel fuel since the 90's and have never had bad fuel.) Anyway ... the dealer attributed the rough idle to the flywheel going ...
I now have the my Golf at a service place I trust to trouble-shoot the rough idle (no codes thrown for that, btw). To be continued.
What I've learned is the "fix" has rendered the most reliable car I've ever owned into a virtually useless money-pit of problems. My unscientific opinion is that this universal "fix" reacts differently depending on model and seemingly unrelated, circumstantial issues arise as a result.
Sure. These cars are designed to go into a shutdown mode or "limp mode" as a fail safe to avoid potential catastrophic engine failure. Basically, every light in the dash turns on and the car immediately decelerates to about 20mph. In theory, this allows the driver to get the car to a safe place. Not fun on the highway.The occasional flutter is certainly annoying. I notice it more at low speeds when the engine hasn't warmed up yet, and I end up manually shifting up a gear. Can you give us more details on the "shutdown" mode?
NON-EXPERT EXPLANATION: The Regens / Regeneration is related to the DPF (diesel particulate filter) which is designed to incinerate diesel emissions. If the car isn't driven enough, or long enough, the DPF may start to clog and need to "regenerate" by simply driving on the highway for about 30 miles—allowing the DPF to do it's job and basically clear the build up.Also, maybe I should know, this but I don't: what are the "regens" and "regenerations" everyone is referring to? Can someone explain this to me?
Thank you, Metz.NON-EXPERT EXPLANATION: The Regens / Regeneration is related to the DPF (diesel particulate filter) which is designed to incinerate diesel emissions. If the car isn't driven enough, or long enough, the DPF may start to clog and need to "regenerate" by simply driving on the highway for about 30 miles—allowing the DPF to do it's job and basically clear the build up.
There will be a light indicator light in the dash that appears when the DPF needs to regenerate.
I have noticed pretty much the same as everyone else except for more reduced mpg's. I was getting about 580 to 600 miles per tank (100 miles/day commute to work) now I am down to about 490-500. Mostly highway driving at 75-80 mph.
I'm also seeing about a 10% drop in mpg when calculated with pen and paper (well by xls) post fix. Car is 2009 gen 1 manual and fix was completed back in August. What really irks me is that mfd shows that I'm getting same or better mpg as before. Its pretty obviously they tweaked the settings so that people would think they're getting better mpg. Isn't this how they got into trouble in the first place?
Your responsibility to lift the hood and at least do a cursory check of everything before departing the dealership. Good thing you found it sooner rather than later. Always do an inspection post service work. What did the dealership have to say?Total fail! I finally lifted the hood today to see the stickers they add after the recall to find they didn't even put my airbox back together. The warm air valve had been replaced but they just left the top of the box flopping around. Not very impressed, we drove it for 4 days like that.