'03 cooper s backfire idle and cutoff problems

myte15
5

Asked by myte15 Oct 12, 2012 at 07:07 PM about the 2003 MINI Cooper S

Question type: Maintenance & Repair

i have a 2003 mini cooper s. it always idles between 900-1100 when its suppose to be at 750. it
backfires when the rpm starts to play and usually struggles for a little then cuts off. ive been to a
couple of mechanics and have done alot of research on the matter looking at forums and whatnot
but could not find a solution to this problem. the cutting off has gotten alot worse, and is really
starting to bug me.

Solutions that havent worked:
searched for an intake leak
changed gas cap
changed evap solenoid (fuel diagnostic pump)

any suggestions
im thinking its probably a sensor or something

5 Answers

myte15
5

backfiring doesnt always occur when the rpm plays but the missing filler cap light always comes on right after or during backfire

Hector Irizarry Duval
1,435

You need to be sure it is backfire, if it is could be a bad crank sensor or ect. Also bad injectors can cause backfire but you need to read the codes. Also make sure if the explosions don't come from the intake because that is a different issue. When you have more info write to be of more help.

John Leone
4,375

perhaps the engine is remaining in "open loop", meaning it is always reading 32 degrees, and the temp sensor isn't telling the computer, or computer isn't communicating with the i.a.c., so sensors to check .ma.p./maf (same sensor come companies refer to it as either, engine temp sensor...either will cause all these problems, it sounds like the engine is operating as it should but again the fuel is not reducing (as it hits closed loop), 900-1100 is started cold, a few moments, and should drop down...i'd start there...let me know if i can help you further

1 out of 1 people think this is helpful.
Robert Charlson
2,415

Did they pull any faults out of the vehicle? I see they have replaced you LDP (leak diagnostic pump) I don't belive your check gas cap light is related to the running rough concern. That pump for the evaporative emission runs off of engine vacuum and if the engine is running rough while the vehicle is trying to test the system it could cause a false reading. I would try a fuel pressure test. It kinda sounds like your engine is being starved of fuel. Hope this helps keep us informed.

1 out of 1 people think this is helpful.
John Leone
4,375

mini is a bmw company now, and they (BMW) had to recall i forgot how many thousands of cars due to fuel pump issues, that was 2 years a go or more,

1 out of 1 people think this is helpful.

Your Answer

Related Questions

  • 2008 mini yellow check enging light staying on loss of power and backfires idle very low 1 answer

    after racing another mini in my neighborhood for fun I noticed the yellow check engine light on and pulled into gas station where it the idle dropped sig and stalled out. When I fired it back up it t...

    2008 MINI Cooper S

    -

    Maintenance & Repair

  • Used Mini Cooper Model/Years 3 answers

    I'm looking for a used Mini Cooper in the 2002 - 2006 year range. I understand that a redesign occurred in 2007. With respect to reliability and performance, are there certain years/models I should ...

    MINI Cooper

    -

    Maintenance & Repair

  • Reliability of the mini? 4 answers

    Are the 2006 mini coopers and newer reliable like a Toyota?

    2006 MINI Cooper

    -

    Maintenance & Repair

  • Mini Cooper check engine light 3 answers

    I have a 2007 Mini Cooper s. I owned it for about three months when the check engine light came on and it went into limp mode. The throttle body was replaced. About 14 months later, the same thing ...

    2007 MINI Cooper S Convertible

    -

    Maintenance & Repair

  • mini cooper 4 answers

    how much is a mini cooper?

    MINI Cooper

    -

    Shopping & Pricing

Cooper
Looking for a Used Cooper in your area?
CarGurus has 9,378 nationwide Cooper listings starting at $2,995.
ZIP:

Search MINI Cooper Questions

MINI Cooper Experts

#1 Robert Charlson
Robert Charlson
Reputation 360
#2 Michael Branan
Michael Branan
Reputation 200
#3 dandyoun
dandyoun
Reputation 170
View All

Related Models For Sale

Used Volkswagen Beetle"
252 Great Deals out of 12,406 listings starting at $795
Used Jeep Wrangler"
590 Great Deals out of 41,632 listings starting at $1,800
Used Honda Civic"
736 Great Deals out of 49,387 listings starting at $999
Used BMW 3 Series"
1,037 Great Deals out of 35,128 listings starting at $1,800
Used Volkswagen GTI"
86 Great Deals out of 3,774 listings starting at $2,200
Used Ford Mustang"
783 Great Deals out of 29,453 listings starting at $1,500
Used Volkswagen Jetta"
726 Great Deals out of 45,409 listings starting at $1,500
Used Mazda MAZDA3"
425 Great Deals out of 27,507 listings starting at $2,550
Used Audi A4"
244 Great Deals out of 10,164 listings starting at $1,800

Used Cars For Sale

2014 MINI Cooper S For Sale
1,622 listings starting at $29,872
2013 MINI Cooper S For Sale
7 Great Deals out of 288 listings starting at $19,500
2012 MINI Cooper S For Sale
5 Great Deals out of 183 listings starting at $15,595
2011 MINI Cooper S For Sale
18 Great Deals out of 291 listings starting at $10,995
2010 MINI Cooper S For Sale
9 Great Deals out of 217 listings starting at $10,000