09-21-2016, 04:24 AM
the ECU cuts fuel if (spark read back is bad; yours is not. cutting fuel. so....)
so that would point to the coil bad. (if primary swings, ECU is happy but can still be dead HV spark) (coils have many failure modes, (shorts in winding's, opens, partial coil shorts. , shorts to core, )
but it be best to photo your distributor, with the lid off so we can see it guts.
and ecu partnumber. 89-91 they have like 3 or more fast evolving spark systems. (OBD1 was cause of many)
after all they must play together to work, and last..
so that would point to the coil bad. (if primary swings, ECU is happy but can still be dead HV spark) (coils have many failure modes, (shorts in winding's, opens, partial coil shorts. , shorts to core, )
but it be best to photo your distributor, with the lid off so we can see it guts.
and ecu partnumber. 89-91 they have like 3 or more fast evolving spark systems. (OBD1 was cause of many)
after all they must play together to work, and last..
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