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OBD Scanners Discussions on using On Board Diagnostic (OBD) scanners/ Diagnostic Equipment related to TDIs

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Old December 2nd, 2018, 16:06   #1
buckhunter94
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Join Date: Jun 2018
Location: Georgia
TDI(s): 02 Golf
Default IQ Cylinder

Okay just set up my VCDS and was looking at some stuff what is IQ cylinder for 1 2 3 4.. and should they be about the same readings
IQ cylinder 1 0.09mg/str
IQ cylinder 2 0.24mg/str
IQ cylinder 3 -0.35mg/str
IQ cylinder 4 0.02mg/str

Last edited by buckhunter94; December 2nd, 2018 at 16:15.
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Old December 2nd, 2018, 19:37   #2
jmodge
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Those are pretty close
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Old December 3rd, 2018, 15:49   #3
QuickTD
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That is injected quantity deviation, the difference in IQ between cylinders. The ECU samples crank speed after each cylinders injection event and corrects the IQ by a small amount on the next cycle to achieve smoothest possible operation.

Your values are well within the acceptable range. The maximum correction that the ECU allows is +/-2.8mg/stroke.
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