For tuneup, I'm buying 6 spark plugs and 6 coil - in boots. Do I need to also buy 6 ignition coils or just 1?
what parts to buy: 6 Coil in boots & 6 ignition coils? on 2003 Infiniti QX4
Are the coils bad? Only 3 coils are needed- each coil fires 2 platinum plugs
I don't know. After I replace the plugs and boots, I'll see if the engine continues to run rough - if so, I'll check the coils. It's a friend's vehicle - I've never worked on an Infiniti. It is good to know that there are only 3 coils instead of 6, given their cost. I do know she hasn't changed the plugs, so that could be the problem. Thanks!