lecap
Bachelor Dog
Some trouble shooting tips:
The fuel pressure regulator of the bike, often and falsely referred to as "fuel filter" has an official service life of 40,000km.-
Since it's a rather expensive part it's often not replaced as per schedule but only after failure.
Failure according to my experience is neither sudden nor catastrophic: (That's the good news)
The pressure regulator over pressurises the injector. The increased pressure gets to fuel injection system to the point where the computer can not compensate any more.
Initially this will be noticeable from poor fuel economy.
The next step is the bike loosing its idle once it warms up. It will still start and idle fine but there is a point where the engine just switches off. This happens when the idle speed air bypass in the throttle body is closed by the computer, causing an overly rich mix at idle which leads to a stall.
At this point you can see something's seriously wrong as your plugs will be pitch black.
The bike's still kind of rideable but I've got no idea for how long since the fouling plugs will leave you stranded sooner or later.
If you're planning a lengthy trip into the deeper parts of the continent you might consider replacing your past expiry date fuel pressure regulator. Else you may ride until you notice the tell tale sign and pick one up on the way home from your BMW dealer.
The fuel pressure regulator of the bike, often and falsely referred to as "fuel filter" has an official service life of 40,000km.-
Since it's a rather expensive part it's often not replaced as per schedule but only after failure.
Failure according to my experience is neither sudden nor catastrophic: (That's the good news)
The pressure regulator over pressurises the injector. The increased pressure gets to fuel injection system to the point where the computer can not compensate any more.
Initially this will be noticeable from poor fuel economy.
The next step is the bike loosing its idle once it warms up. It will still start and idle fine but there is a point where the engine just switches off. This happens when the idle speed air bypass in the throttle body is closed by the computer, causing an overly rich mix at idle which leads to a stall.
At this point you can see something's seriously wrong as your plugs will be pitch black.
The bike's still kind of rideable but I've got no idea for how long since the fouling plugs will leave you stranded sooner or later.
If you're planning a lengthy trip into the deeper parts of the continent you might consider replacing your past expiry date fuel pressure regulator. Else you may ride until you notice the tell tale sign and pick one up on the way home from your BMW dealer.
