I have a 2004 745li smokes blue out of one pipe not heavy. Also one of the vertical cylinder shaped motors or pumps on top of valve cover is leaking oil upwards. Like under pressure. Get codes saying

20

Asked by Dec 16, 2014 at 03:33 PM about the 2004 BMW 7 Series 745Li RWD

Question type: Maintenance & Repair

Secondary air fuel pump malfunction. Are these
problems related. Please help

12 Answers

8,315

what do the cades say and what does the exhaust smell like is it very gaseous

1 of 1 people found this helpful.
20

smells a little of gas not heavy. Codes said secondary fuel air pump relay circuit malfunction. And the other air fuel bank 2 malfunction. Can't remember specifics cause I don't have them in front of me. Sorry will this help?

1 of 1 people found this helpful.
8,315

does the smoke thin out and go away after the vehicle warms up

1 of 1 people found this helpful.
20

I think something to do with emissions

1 of 1 people found this helpful.
20

Yes it does thin out and go away. Right away

8,315

does your smog pump work

8,315

can u send a pic of that cylinder you spoke of

20

Sure give me a sec. It's under a cover

125

Blue Exhaust Smoke A clear sign that oil is being burned in the engine is blue smoke coming from your vehicle’s tailpipe. Oil can leak past where it’s meant to be if piston rings or valve guise seals are worn out. This leaking can allow oil into the combustion chamber, where it will be burned like fuel. If you see what looks like blue smoke, be sure to check your oil often and be aware of possible overconsumption that may be occurring. While you should normally seek attention as soon as possible, since internal repairs may be the next step, an older vehicle with blue smoke may not be so crucial; as long as the leak is minimal it can be maintained by topping off your oil regularly.

20

It won't let me, how?

20

Ok thank you.

8,315

but it would not thin out if it was an oil burner it would blow more whenever you press the gas pedal down

Your Answer

7 Series

Looking for a Used 7 Series in your area?

CarGurus has 5,265 nationwide 7 Series listings starting at $2,999.

ZIP:

BMW 7 Series Experts

  • #1
    lweems
    Reputation
    1,760
  • #2
    Tom Demyan
    Reputation
    600
  • #3
    Vince Lee
    Reputation
    580
View All

Related Models For Sale

Used Mercedes-Benz S-Class
162 Great Deals out of 7,602 listings starting at $2,000
Used BMW 5 Series
488 Great Deals out of 15,604 listings starting at $1,500
Used BMW 6 Series
67 Great Deals out of 2,477 listings starting at $5,950
Used Audi A8
73 Great Deals out of 1,903 listings starting at $2,995
Used Chevrolet Corvette
187 Great Deals out of 18,532 listings starting at $3,941
Used Mercedes-Benz E-Class
677 Great Deals out of 21,918 listings starting at $1,500
Used BMW 3 Series
1,035 Great Deals out of 33,511 listings starting at $1,000
Used BMW M3
30 Great Deals out of 2,083 listings starting at $6,599
Used BMW X5
346 Great Deals out of 15,108 listings starting at $2,995
Used Cadillac Escalade
228 Great Deals out of 12,053 listings starting at $2,000
Used Mercedes-Benz CLS-Class
76 Great Deals out of 2,450 listings starting at $3,950
Used Lamborghini Gallardo
5 Great Deals out of 257 listings starting at $76,500

Used Cars For Sale

2018 BMW 7 Series For Sale
1,536 listings starting at $72,815
2017 BMW 7 Series For Sale
13 Great Deals out of 233 listings starting at $51,900
2016 BMW 7 Series For Sale
3 Great Deals out of 190 listings starting at $45,995
2015 BMW 7 Series For Sale
15 Great Deals out of 441 listings starting at $21,900
2014 BMW 7 Series For Sale
14 Great Deals out of 556 listings starting at $23,999

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.