Rough Idle on cold start-up on Audi A4 1.8T B8.5

20

Asked by Jul 27, 2019 at 01:45 AM about the 2013 Audi A4

Question type: Maintenance & Repair

Hello, I have a 2013 Audi A4 1.8T B 8.5 (petrol). During a cold start-up the
engine rough idles and sometimes shuts off. I have to rev it up a little until its
warm. Once it warms the problem goes away. I changed spark plugs, PCV
valve, HPFP but still have this problem. Any help will be greatly appreciated.
Thanks.

1 Answer

20

Problem Solved. So it was the thermostat that was faulty. Problem is that I did not address this problem on time, now with a faulty thermostat this causes the engine to run lean on a cold start, hence the rough idle. If this problem is not address on time (like mines) it causes misfires on all 4 cylinders hence stretching the timing chain. So now I also have to change the timing chain as well. If you ever have a problem like mines, please address it urgently otherwise it will end up costing you much more in the end.

Your Answer:

Audi A4 Experts

  • #1
    Deathjam4
    Reputation
    7,240
  • #2
    lukeyramone
    Reputation
    920
  • #3
    Josh Holder
    Reputation
    740
View All

Find great deals from top-rated dealersTM

Search

Related Models For Sale

Used BMW 3 Series
128 Great Deals out of 2,547 listings starting at $2,985
Used Audi A6
16 Great Deals out of 255 listings starting at $1,950
Used Audi A5
20 Great Deals out of 315 listings starting at $9,450
Used Mercedes-Benz C-Class
66 Great Deals out of 1,705 listings starting at $3,300
Used Audi S4
12 Great Deals out of 160 listings starting at $6,490
Used Audi A3
30 Great Deals out of 378 listings starting at $2,850
Used BMW 5 Series
27 Great Deals out of 706 listings starting at $2,999
Used Honda Accord
50 Great Deals out of 1,923 listings starting at $2,795
Used Audi Q5
49 Great Deals out of 1,035 listings starting at $8,499
Used Mercedes-Benz E-Class
52 Great Deals out of 827 listings starting at $4,415
Used Honda Civic
150 Great Deals out of 6,170 listings starting at $1,700
Used Dodge Charger
34 Great Deals out of 793 listings starting at $3,500
Used Volkswagen Jetta
62 Great Deals out of 3,010 listings starting at $995
Used Audi A7
7 Great Deals out of 125 listings starting at $17,900
Used Ford Mustang
46 Great Deals out of 1,775 listings starting at $3,995

Used Cars for Sale

2019 Audi A4 For Sale
134 listings starting at $46,695
2018 Audi A4 For Sale
8 Great Deals out of 58 listings starting at $27,499
2017 Audi A4 For Sale
11 Great Deals out of 129 listings starting at $23,700
2016 Audi A4 For Sale
8 Great Deals out of 91 listings starting at $18,990
2015 Audi A4 For Sale
17 Great Deals out of 237 listings starting at $15,490

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. Content will be removed if CarGurus becomes aware that it violates our policies.