Hello all.
I have a 2002 Pathfinder with a 5 speed and about 200k miles. It's now had multiple coil failures. For a while my mechanic was replacing one at a time, and finally decided that there was a bad batch of coils and replaced all coils (with a different brand) and all new plugs as well.
The problem recurred (misfiring and blinking CEL). The time interval between failures was about the same as before switching brands (probably 500-1000 miles or less).
This rig also seems to think its a two stroke - when you add gas, you also add a quart of oil (tho not in the fuel tank). At times it visibly smokes a bit at shutdown. It seems to be leaking oil from the valve covers. The visible smoke can be a bit troubling.
My admittedly uniformed hunch is that the oil leak is messing up the coils and/or plugs. My mechanic said they saw no sign of that, but plainly something is causing the coil failures.
Thanks for any insights anyone can offer!
