i just discovered my 1999 bmw e46 has a tear and crack on intake boot and engine stalls when you start it and eventually switches off but when i disconnect air flow sensor it works perfectly

Asked by Feb 26, 2015 at 12:05 PM about the 1999 BMW 3 Series

Question type: Maintenance & Repair

3 Answers

270,145

Replace the boots and clean the MAF and see if things improve. Do you have a CEL on?

270,145

Disconnecting the MAF causes the ECU to use the TPS and default fuel maps. These maps are defaulted to enriching the air/fuel mixture and that's why things work better. Vacuum leaks, aka ripped hoses after the MAF will make your car run terrible.

58,325

In my BMW Z4 that I used to own...even a miss-installed oil fill cap will make the cel light come on and the idle very rough. These cars are very sensitive to un-metered air leaks.

Your Answer

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 33,371 nationwide 3 Series listings starting at $1,428.

ZIP:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    5,290
  • #2
    Robert Charlson
    Reputation
    1,690
  • #3
    grolyate
    Reputation
    1,290
View All

Related Models For Sale

Used BMW 5 Series
482 Great Deals out of 16,340 listings starting at $1,032
Used BMW M3
40 Great Deals out of 1,964 listings starting at $5,495
Used Mercedes-Benz C-Class
875 Great Deals out of 26,285 listings starting at $1,500
Used Audi A4
253 Great Deals out of 12,019 listings starting at $1,899
Used Ford Mustang
454 Great Deals out of 42,975 listings starting at $1,488
Used Mercedes-Benz E-Class
571 Great Deals out of 22,441 listings starting at $1,999
Used Honda Accord
900 Great Deals out of 79,954 listings starting at $1,295
Used BMW 7 Series
130 Great Deals out of 5,116 listings starting at $1,770
Used Chevrolet Camaro
510 Great Deals out of 31,320 listings starting at $2,495
Used BMW X5
343 Great Deals out of 15,559 listings starting at $1,995

Used Cars For Sale

2018 BMW 3 Series For Sale
16 Great Deals out of 6,142 listings starting at $31,076
2017 BMW 3 Series For Sale
121 Great Deals out of 3,728 listings starting at $22,989
2016 BMW 3 Series For Sale
53 Great Deals out of 1,161 listings starting at $14,991
2015 BMW 3 Series For Sale
145 Great Deals out of 3,403 listings starting at $14,899
2014 BMW 3 Series For Sale
279 Great Deals out of 4,371 listings starting at $11,979

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.