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Date: Sat, 02 Jul 2005 09:49:57 +0200 From: MH <nonospamks.no> Subject: Re: 900 VERY annoying trouble
> Can someone tell me what an "air mass meter" is? It's exactly what the name implies; it measures the mass of air being sucked into the engine, so the ECU will know how much fuel to inject. There's a fixed (stoichiometric) 14.6:1 air:fuel ratio. > What does it look like, Somewhat like a venturi in a carburetor, but with a heated platinum wire inside it. > where does it sit Between the air filter and the throttle plate > and what does it do? The platinum wire is heated to a constant 100deg C. The passing air flow cools it and changes its resistance, from the change the ECU can calculate the mass of the airflow. > I'm not sure if my Saab has one or not Only on 16 valve engines. 8v engines have another type of airflow sensor; a large baffle plate. Its movement directly controls the fuel pressure in the fuel distributor > I've not heard of it before so I think I don't have one. It is the 8 > valve motor. You need a manual.... -- MH '72 97 '77 96 '78 95 '79 96 '91 900i
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