Car stall when releasing foot when putting gas

Asked by GuruYJBS8 Apr 07, 2018 at 09:26 PM about the 2008 Audi A4 2.0T Sedan FWD

Question type: Maintenance & Repair

Hi deathjam4 I hope u can help me I have Audi A4
1,8 Sline b7 2008 ,car had some noise coming
from engine ,my mechanic told me noise was from
crank case hose had a hole ,got it later he told me
the car don't have much power & cranks twice or
more before it can start ,I got a new fuel pump the
car after fitting pump a vacuum pipe had a leak car
was misfiring, got original from dealer after
replacing ,Air relief valve was also leaking ,got
original from dealer ,now when the is on park rpm
goes up to 1,200 rpm  & few months thermostat
housing got broken water leaks & I replaced after
the next day when I hit the brakes at stop when I
put gas the car rev goes down when I leave gas it
goes up , so when get to stop before I hit gas I
leave brake foot 2 seconds then hit gas it drives it's
really annoying me

5 Answers

45,335

It sounds to me like the car is having some serious vacuum issues. I found a link to a website that shows a bunch of trouble areas that might help properly diagnose this issue which i will post a bit after this. One video i found which is simalure to yours said he replaced the pcv valve and prv valve fixed the issue. how many miles do you have on this car? and when was the last proper tune up? such as plugs and wires and fuel filter and such? once you have the car fixed I would do a proper tuneup. Bringing a car out of the pits can be hard if the maintenance has been lackinging. When i had my old 1998 audi i was still doing repairs on it 7 years later to keep it running right and i still had not fully fixed it before i got rid of it. I would probably have the whole vacuum system torn down cleaned out and replace what looked to worn out I did that the second year after i bought my 1998 as the hosing was pretty cheap. still have spare hose for it today :P any who go over the link i am provideing and have the trouble area's fixed and try replacing those two valves i mentioned if you have not done so already. It would not be a bad thing either to break down the air system and remove the thortle body and have it cleaned and then reinstalled with a new gasket and clean all the sensors in the air way as well. should help. https://www.pelicanparts.com/techarticles/Audi_B6_A4/47-ENGINE- Fixing_Common_Vacuum_Leaks/47-ENGINE-Fixing_Common_Vacuum_Leaks.htm

1 people found this helpful.
Best Answer Mark helpful

Thanks Deathjam4 I've done oil service on two months ago ,New oil ,New petrol filter ,oil filter,Air filter & New plugs + diagnosis

45,335

get them vacum lines and crank case hoses checked out they make a huge differance in a stable running audi.

That vacuum steel pipe has a crack ,I've bought new second hand from Fourspring Audi spares ,will let u know when it's right & Thanks a million times Deathjam4 u are the master.

Your Answer:

A4

Looking for a Used A4 in your area?

CarGurus has 664 nationwide A4 listings starting at $1,995.

Postal Code:

CarGurus Experts

  • #1
    Deathjam4
    Reputation
    13,160
  • #2
    lukeyramone
    Reputation
    1,370
  • #3
    James III
    Reputation
    1,220
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used BMW 3 Series
61 Great Deals out of 1,153 listings starting at $2,500
Used Audi A6
3 Great Deals out of 112 listings starting at $7,800
Used Audi A5
6 Great Deals out of 178 listings starting at $10,981
Used Audi S4
6 Great Deals out of 90 listings starting at $17,000
Used Audi A3
18 Great Deals out of 358 listings starting at $5,499
Used Mercedes-Benz C-Class
79 Great Deals out of 1,318 listings starting at $3,500
Used Audi Q5
62 Great Deals out of 1,297 listings starting at $4,850
Used Honda Accord
49 Great Deals out of 976 listings starting at $2,995
Used BMW 5 Series
14 Great Deals out of 281 listings starting at $5,299
Used Honda Civic
188 Great Deals out of 4,039 listings starting at $2,530
Used Lexus IS
16 Great Deals out of 399 listings starting at $5,999
Used Audi S5
4 Great Deals out of 92 listings starting at $10,995
Used Dodge Charger
45 Great Deals out of 858 listings starting at $5,995

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.