The diesel engines used in Vanagons have no throttle housing or AFM. The air supply to the intake is neither controlled or measured. Diesels do not need these because they do not operate on the basis of maintaining a fuel/air mixture ratio. They have a mechanical injection system which varies the amount of fuel based on rpm and pedal position only. The air supply is constant at a given rpm. VW TDI motors do have AFMs but they are not interchangeable. Mark Douglas Miller wrote: > > Could the idle speed adjusting screw/throttle valve housing be my > problem? Is a 1.9 throttle housing interchangeable with a diesel or a 2.1L ? > Is the AFM on a 1.9L interchangeable with a diesel or a 2.1L? > Thanks once again, > Doug |
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