Quote:
Originally Posted by glenwyatt
The N62 engine is prone to vacuum leaks and is also very sensitive to them when they occur.
One other thing to check would be the injector for the cylinder. Swap it with a known good one and see if the misfire follows the potentially bad injector.
Lastly, if you haven’t found the problem, you may want to do a leak down test of that cylinder to check it’s overall health.
|
I just had a vacuum leak on my 325xi and it will exhibit the symptoms described by the OP. But searching for a problem with a single cylinder injector or coil pack is a waste of time when you have 7 cylinders misfiring. You don't get all injectors failing at once unless you have VERY bad fuel, nor do all coil packs fail at once. Unmetered air leak is a great place to look though.