24 May 2007, 11:03
Jazeker (niet dat ik het ooit gedaan heb). Hier een leerzaam stukkie Engels:
The air mass meter (AMM) reads the flow of air and regulates the fuel mixture and when it fails it usually can be crudely diagnosed. Typical failure is a car that will not start. Simply unplug the AMM and try to start the car. With it unplugged the fuel injection defaults to full rich. It may be harder to start but once started it will idle and can be driven out of harm's way. Some people call this the "Limp Home Mode." It will stall regularly but it will only drive short distances. Once a bit warm you can get the engine to idle on its own with the AMM unplugged.
To test the AMM plug it in and if the engine dies the meter is bad. If the idle races and then idles better the AMM is working. Do not rely on the on-board diagnostic codes that tell you the AMM is bad. The OBD is primitive and may mis-diagnose the problem.
The air mass meter (AMM) reads the flow of air and regulates the fuel mixture and when it fails it usually can be crudely diagnosed. Typical failure is a car that will not start. Simply unplug the AMM and try to start the car. With it unplugged the fuel injection defaults to full rich. It may be harder to start but once started it will idle and can be driven out of harm's way. Some people call this the "Limp Home Mode." It will stall regularly but it will only drive short distances. Once a bit warm you can get the engine to idle on its own with the AMM unplugged.
To test the AMM plug it in and if the engine dies the meter is bad. If the idle races and then idles better the AMM is working. Do not rely on the on-board diagnostic codes that tell you the AMM is bad. The OBD is primitive and may mis-diagnose the problem.
Volvo 940 1997 Volvo 144 1969