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Re: More MB
We have three cars - John's MB (the patient), mine, and Roger's.
a) All of the pressures test OK on all the cars at idle and when
running the diagnostics from the ECU (I find that gives a much
more readable system pressure).
b) My air mass sensor assembly (also carries the control pressure
regulator and frequency valve) produces exactly the same symptoms
in John's car. All three control pressure regulators produce
good results in my car and bad results in John's.
c) As I pointed out some time ago, the potentiometer in the air mass
sensor is _MUCH_ more accurate than it needs to be for the job it
does - less than 1% delta between the cars, measured using a 1348/1
to hold the paddle. Using this potentiometer, we can see that any
of the air mass sensors, when fitted to John's car, tops out at
4500. On my car, there's still free movement at 6300.
d) All of the hoses have been bench-tested.
Have you tried swapping ECUs? Sounds like you've eliminated most of
the other possibilities...
- Re: More MB
- From: email@example.com (Phil Payne)