Chiefkieff11
New Member
Seeking help from the wise
I have a 1st gen 1uz in my 240sx on a 89661-50032 ecu (26 16 22 26 plug) with the KA Transmission.
I’m chasing a random miss that worsens as engine gets to temp. The only two codes i’m getting are 14 and 15, but the car runs???
Things i’ve done:
-All 8 injectors were professionally serviced by AUS Injection here in AZ, everything fuel side is good.
-I’ve tested primary and secondary resistance on ignition coils cold, all are within spec, i even tested my spares to compare.
-I have 12v going to both igniter connectors in the middle pin.
-I’ve checked wiring for primary 02 sensors (i only run these two)
-I’ve opened up the ecu to look for signs of damage, didn’t see anything out of the ordinary.
-I’ve pulled plugs one by one and it appears i’m getting good spark at each cylinder because each one made the motor run like absolute shit.
I’m going crazy trying to figure this out. Any guidance would be amazing.
I have a 1st gen 1uz in my 240sx on a 89661-50032 ecu (26 16 22 26 plug) with the KA Transmission.
I’m chasing a random miss that worsens as engine gets to temp. The only two codes i’m getting are 14 and 15, but the car runs???
Things i’ve done:
-All 8 injectors were professionally serviced by AUS Injection here in AZ, everything fuel side is good.
-I’ve tested primary and secondary resistance on ignition coils cold, all are within spec, i even tested my spares to compare.
-I have 12v going to both igniter connectors in the middle pin.
-I’ve checked wiring for primary 02 sensors (i only run these two)
-I’ve opened up the ecu to look for signs of damage, didn’t see anything out of the ordinary.
-I’ve pulled plugs one by one and it appears i’m getting good spark at each cylinder because each one made the motor run like absolute shit.
I’m going crazy trying to figure this out. Any guidance would be amazing.