Hi guys! I'm new to the site. I have a 98 nissan cefiro with a vq20 engine currently with 99,000 kms on it. I had it checked at a nissan service center and one of their recommendations was to change all the ignition coils. I believe that these coils do not develop problems at the same. Do I really need to have all these changed or can I just change those which are developing or showing signs of failure? I also would like to ask you guys what are the things that I have to get done for a tune-up. appreciate any reply.
thank you so much.