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crank and cam trigger accuracy


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A trigger error will usually only be registered if the tooth count between sync pulses did not match what the ECU has been set to expect.  In some cases you can have significant trigger error even without a trigger error being registered/logged so there are other clues that you need to look at to diagnose.  RPM ROC scatter and Dwell scatter are often good indicators.

If you have a problem, please give more detail.

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thanks for the reply

ive just installed new short block in V5-6 wrx. Engine timing is about half tooth out of sync. im assuming because cylinder heads been machine few times now.

i was looking at ways trying to verify timing issue, maybe ecu trigger scope?

i have no trigger errors

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