Re: troubleshooting a/f ratio gauge - Saab 900 Bulletin Board - Saabnet.com
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Re: troubleshooting a/f ratio gauge
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Posted by SB 88SPG (more from SB 88SPG) on Tue, 3 Oct 2000 21:10:54 Share Post by Email
In Reply to: troubleshooting a/f ratio gauge, Chad88SPG, Tue, 3 Oct 2000 16:31:22
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Hey chad... i run the a/f gauge too... have you tried adjusting AMM as per bentley... i have mine set at 520ohms resistance measured between pins 3 and 6. bentley suggests 380ohms as a starting point and go from there... dont use the Bentley number as the be all and end all though. Also if you are running the RRFPR, try turning down fuel pressure... if you have a 2.5 bar or 3bar FPR it sounds like the diaphragm is leaking and causing an overly rich mixture... try replacing with a known working one first. at idle you should get a sweep of lights from lean area to just rich... is there just no lights showing up or is it stuck in the rich area at idle? dont forget the engine relies soley on readings from AMM till at operating temp, tehn relies on both o2 sensor and AMM. check function of items listed above and go from there... let us know what happens.
cheers from down under
Steve
88 900 aero
247,000km

my 88 900 Aero website - check it out for more details

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