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https://www.autonerdz.com/cgi/yabb2/YaBB.pl General Public Area >> PicoScope >> pico diagnostics cylinder balance https://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1289898080 Message started by autosparky on Nov 16^th, 2010 at 1:01am

Title: pico diagnostics cylinder balance
Post by autosparky on Nov 16^th, 2010 at 1:01am

can someone explain how Pico does a cylinder balance test while only connected across the battery?? how does it work out engine speed?

Title: Re: pico diagnostics cylinder balance
Post by dcsvan on Nov 16^th, 2010 at 3:30am

I am only guessing but thought it may use the AC (diode test) as a frequency and work out the Alternators increase and decrease in revolutions. Hence the relative power produced??

Title: Re: pico diagnostics cylinder balance
Post by PaddyIreland on Jan 2^nd, 2011 at 9:01am

Most likely voltage drop. Max current at starter motor is on compression stroke. So would also be max voltage drop. Differences in voltage drop would indicated differences in compression. Two compression strokes per revolution will give RPM.