2002 BMW 525i rought idol at start up

2002 BMW 525I
98,000 MILES • 6 CYL • 2WD • AUTOMATIC
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DEEPDIVER
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  • 1 POST
it has a rough idol at start up and stalls untill it warms up. check engine comes on codes say misfire cilinder 4, gave it a tune up still does it, it has a misterious coolant leak that cant be found i wonder if it has something to do with it
Feb 17, 2010 at 1:56 PM
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DOCHAGERTY
  • ✓Experienced Mechanic
  • 9,606 POSTS
Pressure test the cooling system with the plugs out overnight. If the coolant is going in the cylinders, you will see it when you crank it over, it'll fly out of the spark plug holes.
Feb 17, 2010 at 4:18 PM
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