ken60 Posted July 28, 2010 Posted July 28, 2010 Good advice required please. Recently bought a 2006 Fazer 1000 - which I adore and which runs sweet but has an increasing problem developing. It will suddenly want to die causing it to momentarily fade and pick-up again, and will do this for some time. A dianostic fault code appears, reference to which states: 'the atmospheric pressure sensor voltage and the intake air pressure sensor voltage differ greatly'. Can anyone please give me a clue what this might actually mean and how to rectify the troubling problem. I have to travel across Spain in a couple of weeks. I am mechanically fairly adept, but a real numty when it comes to electronics. Thanks club members.
pilninggas Posted July 28, 2010 Posted July 28, 2010 What it is saying is that the MAP sensor which looks at manifold pressure and the air pressure sensor are giving differing readings. The map sensor is continuously variable and sees everything from a vacuum at closed throttle, to atmospheric at WOT (as there is nothing to stop the air 'dropping' in). The atmospheric sensor looks at the ambient air pressure and compensates the fuel injection when at high altitude etc, where there is a pressure variation. My guess would be that one of these sensors is failing, but what you need to do is find out what kind of reading they give at atmospheric and run a diagnostic. I know with my XJ6 i can see from the diagnostic what pressure the intake is reading without the engine running (mine only has the one sensor), something like 101KPa or 1010mBar is the norm. of course it could be a dodgy connection, though i do think Yam's electrical connectors are of a fine quality.
ken60 Posted July 28, 2010 Author Posted July 28, 2010 What it is saying is that the MAP sensor which looks at manifold pressure and the air pressure sensor are giving differing readings. The map sensor is continuously variable and sees everything from a vacuum at closed throttle, to atmospheric at WOT (as there is nothing to stop the air 'dropping' in). The atmospheric sensor looks at the ambient air pressure and compensates the fuel injection when at high altitude etc, where there is a pressure variation. My guess would be that one of these sensors is failing, but what you need to do is find out what kind of reading they give at atmospheric and run a diagnostic. I know with my XJ6 i can see from the diagnostic what pressure the intake is reading without the engine running (mine only has the one sensor), something like 101KPa or 1010mBar is the norm. of course it could be a dodgy connection, though i do think Yam's electrical connectors are of a fine quality.
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