180° Interval Difference Method

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC METHOD CHART

Diagnostic value domg 180 = (omg 1 - omg 0) - (omg 5 - omg 1)/4

Judge as a misfire in the following cases.

domg 180 > judgment value of positive side
domg 180 ≤ judgment value of negative side

(Judgment value before 180° CA)

Fig 1: Crankshaft Position Speed Graph (180 Deg Interval Difference Method)

Courtesy of SUBARU OF AMERICA, INC.