Ok here is where I'm at, I go to the circuit I suspect which is the "IGF circuit" and do a continuity check.
Here is what I find: checking at the ECU E4 pin #3 l/y. TO. Ltblue/yel at any given coil, and there is no continuity at all, Good news I think, well we will see.
There is good continuity from coil to coil.
I suspect open between IGF junction and ECM.
I wonder why its throwing code for coil #4 and not all.
Going to open up the harness a little more and do some more testing tomorrow, Keep your fingers crossed.
Wednesday, February 22nd, 2012 AT 4:26 AM