I have a check engine light in
when using gm278 I get 8 codes but they indicate False
when using gm87 I get 8 code but they indicate True
The first one using gm87 is no reference pulse
The first one using gm278 is 61- prom Error but "false"
I think I may have a bad ECM
Which Definions should I use? I had a bad block and replaced engine from a
1998 grand Prix type K all the same sensor, everything worked before escept
the block cracked.
Thanks