My 1985 BMW 318I runs great but doesn't idle down after warming up. It will idle down and back up.

Asked by Feb 07, 2008 at 12:02 PM about the 1985 BMW 3 Series 318i

Question type: Maintenance & Repair

2 Answers

44,205

Sounds like the throttle pull-off or idle control thermostatic piece (not sure of the name on a BMW) is bad. Typically there is a small thermostat-like device which, as it heats up, lowers the throttle to curb idle instead of the high idle on start-up.

My car does the same thing except sometimes it will rev up and down and the gages go all crazy, i was told it could be a idle injector valve that was dirty or faulty, but it only does this once in a great while.

Your Answer

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    4,900
  • #2
    Robert Charlson
    Reputation
    1,610
  • #3
    Matt Mankinen
    Reputation
    1,240
View All

Related Models For Sale

Used BMW 5 Series
490 Great Deals out of 16,616 listings starting at $2,000
Used BMW M3
42 Great Deals out of 1,432 listings starting at $4,990
Used Ford Mustang
762 Great Deals out of 42,755 listings starting at $1,300
Used Honda Accord
1,020 Great Deals out of 62,741 listings starting at $999
Used Chevrolet Camaro
418 Great Deals out of 31,785 listings starting at $2,395
Used BMW 6 Series
89 Great Deals out of 2,817 listings starting at $5,980
Used BMW 7 Series
160 Great Deals out of 6,030 listings starting at $2,500
Used Dodge Charger
467 Great Deals out of 27,625 listings starting at $1,650

Used Cars For Sale

2017 BMW 3 Series For Sale
176 Great Deals out of 8,723 listings starting at $25,429
2016 BMW 3 Series For Sale
50 Great Deals out of 1,903 listings starting at $19,500
2015 BMW 3 Series For Sale
35 Great Deals out of 1,152 listings starting at $15,995
2014 BMW 3 Series For Sale
235 Great Deals out of 5,246 listings starting at $13,315
2013 BMW 3 Series For Sale
43 Great Deals out of 1,623 listings starting at $10,900

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.