I started noticing some power loss and a slight miss when driving, also the idle got a little rough. Never threw any codes though.
I did some datalogging and saw misfires on cylinders # 7 & 8. I changed the plugs to the Brisk ones, but still showed misfires for the same cylinders afterwards.
I tested resistance on the coils and they were all fine, I also switched out coils on 7 & 8 just to make sure and still got the misfires.
Did a dry compression test and all cylinders were at 190 psi, Wet test increased psi by about 20 psi on each one. How long is each cylinder supposed to hold pressure? I watched and noticed how pressure dropped a bit after a short period of time.
Any ideas?
Here's the old plugs I removed:
I did some datalogging and saw misfires on cylinders # 7 & 8. I changed the plugs to the Brisk ones, but still showed misfires for the same cylinders afterwards.
I tested resistance on the coils and they were all fine, I also switched out coils on 7 & 8 just to make sure and still got the misfires.
Did a dry compression test and all cylinders were at 190 psi, Wet test increased psi by about 20 psi on each one. How long is each cylinder supposed to hold pressure? I watched and noticed how pressure dropped a bit after a short period of time.
Any ideas?
Here's the old plugs I removed:
