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02-09-2012, 10:26 PM
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#11 |
 ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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There's actually an OBD PID for reading the injector pulse width, which returns a value between 0 and 32.64 ms. The duty cycle is a function of the pulse width and the engine RPM.
IDC = (RPM x IPW) / 1200 So, if the injector pulse width is 20 ms @ 5000 RPM, then the injector duty cycle = (5000 x 20) / 1200 = 83.3%
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