This and my question becomes the make and model are correct for the computer you are reading from? Meaning the ECU and sensor are correct for the make and model? If the ECU is expecting 1 pulse per revolution and seeing two I would expect what you are seeing. Problems like this usually point to changes in things like sensors and ECU.Well, the RPM is measured by counting the pulses not from an analog voltage level. Do you have any idea why your are apparently getting two counts per revolution? Does the ECU have some sort of configuration option for the sensor?
Not sure where your getting that. RPMs are the speed the crankshaft is turning, has nothing to do with the combustion cycle, whether talking about 4 cycle or 2 cycle.Are you sure that you're reading it correctly? The crankshaft rotates twice per combustion cycle, so you might be reading the signal incorrectly.
I mean if he's reading or calculating is some odd way. If the sensor has only one pulse per revolution then he's doing something wrong. He hasn't shown or described anything so we can't assume he's got the "per minute" thing right.Not sure where your getting that. RPMs are the speed the crankshaft is turning, has nothing to do with the combustion cycle, whether talking about 4 cycle or 2 cycle.
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by Jake Hertz