I’ve got a p0306 code on my ‘02 4Runner 3.4L v6, so my plan is to check the plugs n coils first. Context: 250k miles, got a p0304 code 3 years ago, but I’m not sure what the shop did to solve. Plug, coil, both(?), on cyl 4 only, or all?
My questions, if anyone can help, are:
1) is this the best...