Engine races when slowing down

Asked by Jul 02, 2016 at 07:33 PM about the 2012 Volkswagen Jetta TDI w/ Premium and Nav

Question type: Maintenance & Repair

I have a 2012 Jetta TDI which I purchased from new. I know her well and how
she drives. I have 92,000 miles on her and maintain her only at the VW
dealership. Over the last say...8 months, my engine races when I slow down. I
swear it's like someone is holding their foot on the gas and the engine just
races while I bring my Jetta to a slow stop. I have repeatedly taken my car to
the dealership to find out why she is doing this only to be told, nothing is
wrong with her (no codes and the like). My 100,000 mile warranty runs out
soon and I am afraid of not addressing something that could potentially cost
me some big bucks if not addressed. I would really appreciate any input on my
situation.

5 Answers

11,495

can you provide a bit more info about the car? such as enigne size is it a turbo and such. also when was the last time the glow plugs were done? try getting your car to repeat this problem and record it on your phone or a camcorder. this could be caused from excessive carbon build up in the engine. have the throtle body checked for signs of damage as well. are there any out of the normal sounds during regular operation? such as rattling ticking and the like?

She is a 2.0 L 4-cylinder turbo diesel. The glow plugs were replaced last year. There are no abnormal sounds at all when driving. If I am driving for example 55 mph and I go to slow down...the engine starts to rev like it's racing. I have tried to tell the dealership that this is not something that I have ever experienced since I purchased her however, they tell me everything checks out. I will take her in this week or next if I can and ask them to check the throttle body. If there is excessive carbon build up in the engine, is there something I can do to address it or is that something only the shop can take care of?

11,495

Normally if its left to long its something only a shop can handle as after a certain amount of time it gets so bad that only a chiseled can get it off. This is a automatic right ? there is a possibility the trany fluid is low or there might be a trany issue. its entirely possible the transmission is disengaging or lowering gear when it shouldn't be often cause by low fluid levels. so have them check the fluids while your in. And just so you know vw does and can decarbon the engine but it is costly since they have to tear down the engine to do it. in most cases tho it is good to be done. the 2L shouldnt have a turbo so that wouldnt be the issue which is what i thought might cause the issue. The only other thing i can think of is maybe reseting hte computers for the trany and main ecu. it might correct the issue if its jsut a bug in the system.

Best Answer Mark helpful

Thank you for taking the time to respond to my query. You definitely have given me some things to think about and questions to ask the dealership. I've read some really bad reviews on the VW Jetta's however from my own personal experience, it is one of the best vehicles I have ever owned.

11,495

yea i owned a 98 audi for 7 years before i bought my jetta but i rushed into a car that was subpar at best the dealership already sunk 10k into my car in the last year that i have owned it on warranty repairs. i got a simalur one to you jsut with the gas 2.5L engine. Overall i think its a good car but i just bought a lemon and they refused to take it back and short sticked me with it so i been making them pay for it they already lost what i payed for it so i think i came out ahead :P any wyas keep me posted

1 of 1 people found this helpful.

Your Answer

Jetta

Looking for a Used Jetta in your area?

CarGurus has 32,738 nationwide Jetta listings starting at $500.

ZIP:

Volkswagen Jetta Experts

  • #1
    Goodwrench707
    Reputation
    2,580
  • #2
    Deathjam4
    Reputation
    2,090
  • #3
    Tom Demyan
    Reputation
    1,590
View All

Related Models For Sale

Used Volkswagen Passat
350 Great Deals out of 27,088 listings starting at $695
Used Honda Civic
590 Great Deals out of 52,285 listings starting at $1,500
Used Volkswagen GTI
101 Great Deals out of 7,576 listings starting at $1,400
Used Honda Accord
858 Great Deals out of 87,670 listings starting at $1,444
Used Volkswagen Golf
80 Great Deals out of 3,974 listings starting at $695
Used Toyota Camry
1,107 Great Deals out of 76,352 listings starting at $1,100
Used Toyota Corolla
907 Great Deals out of 69,857 listings starting at $1,479
Used BMW 3 Series
1,119 Great Deals out of 33,866 listings starting at $1,209
Used Audi A4
239 Great Deals out of 12,091 listings starting at $1,450
Used Nissan Altima
1,175 Great Deals out of 74,499 listings starting at $900
Used Chevrolet Cruze
803 Great Deals out of 62,411 listings starting at $2,900
Used Mazda MAZDA3
256 Great Deals out of 27,048 listings starting at $1,500
Used Volkswagen CC
75 Great Deals out of 2,481 listings starting at $4,350
Used Ford Focus
603 Great Deals out of 69,617 listings starting at $1,750
Used Volkswagen Tiguan
190 Great Deals out of 24,542 listings starting at $4,500

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.