Re: Replaced AMM today. My findings...(long) - Saab 900 Bulletin Board - Saabnet.com
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Re: Replaced AMM today. My findings...(long)
Posted by gorper (more from gorper) on Fri, 9 Aug 2002 20:13:40
In Reply to: Replaced AMM today. My findings...(long), RayV, Fri, 9 Aug 2002 19:42:28
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did you pull the CEL codes? which codes did you get?
in a *warm* car, the idle is maintained by the O2 sensor, not the AMM, so post-'new' AMM install good idle indicates nothing as to the unit's condition.
there is some question (i've never seen a definitive answer anyway) as to whether the AMM signal is *ignored* at high RPM; some conjecture that the ECU is going by fuel maps alone @ WOT.
did you test the diaphram? pull the hose off the intake manifold. now, with a mityvac or similar pressure source, pressurize the diaphragm w/~5-6 lbs pressure; u should get about 6* retard & it should hold.
posted by 209.31.208...
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