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How to diagnose ignition timing on 91 900NA?
Posted by Harold [Email] (more from Harold) on Tue, 21 Dec 2004 09:16:02
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I have changed the Hall Sensor (used a spliced in sensor) on my 91 900 NA recently and replaced the HB at the same time. The car runs fine now (no more cutting out suddenly while driving) but I have the impression that I lost some power at higher speeds. Driving up to 65 is normal but in order to speed up to 75 and keep it there, I just seem to have to push the accelerator in further than I did in the past. My fuel consumption also seems to have gone up (I keep meticulously track of each tank).
I verified the timing at idle and I am right at 14 degrees advance at the right idle speed. I know the ECU takes it from there but what else can I look at?
Thanks in advance, Harold
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