Rough idle

Asked by Guru53YYL Feb 10, 2018 at 10:04 PM about the 2004 BMW 3 Series 325i Sedan RWD

Question type: Maintenance & Repair

Idles rough especially after sitting
overnight. Almost sounds like a back fire
thru air intake. Any suggestions?

1 Answer

7,455

Would scan for any pending codes if not done so already. Check for vacuum leaks. Any rubber hoses associated with vacuum lines. Have a look at the condition of your spark plugs and MAF. A dirty MAF can throw off your air/fuel ratio. Other thoughts are checking the fuel pump pressure at the rail. Good luck!

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Robert Charlson
    Reputation
    3,900
  • #2
    apbimmer98
    Reputation
    3,080
  • #3
    Abu Luca
    Reputation
    2,980
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used BMW M3
9 Great Deals out of 79 listings starting at $14,995
Used BMW 5 Series
29 Great Deals out of 288 listings starting at $5,299
Used Mercedes-Benz C-Class
75 Great Deals out of 1,322 listings starting at $3,500
Used Lexus IS
18 Great Deals out of 399 listings starting at $599
Used Ford Mustang
42 Great Deals out of 1,614 listings starting at $8,995
Used BMW M5
35 listings starting at $25,990
Used BMW X3
58 Great Deals out of 1,203 listings starting at $4,400
Used Mercedes-Benz E-Class
34 Great Deals out of 511 listings starting at $5,450
Used BMW X5
60 Great Deals out of 981 listings starting at $7,988
Used Honda Accord
52 Great Deals out of 978 listings starting at $2,995

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.