Quote Originally Posted by VxSport View Post
Inspect the air filter too.. invest in a k&n filter for better perforance.
Use the search function to read up on this before you invest. Many members have switched back from K&N because of fouling the MAF. Others still swear by them though.

Quote Originally Posted by blacksambo View Post
I don't know about replacing plugs, mine has 158K on the original plugs, and no misfiring yet?? ( I know this sounds spooky, but as far as I know it's true.) My NAPA guy told me to forget plugs, he used work at a BMW dealer and the cars came in there with 130k plus all the time with the original plugs and no misfires. Take it from there.
Yah, I'm not a big fan of changing out the plugs either ... unless there is a problem. In the Samurai I had years ago, I never changed the plugs & at 225K miles, it started running really bad. I pulled the plugs & found that although they were in pretty good shape, the gap was about 60 (twice what it should have been). The replacement plugs lasted about 20K miles. I regapped the original plugs & put them back in for the remaining 50K miles that I had it.

On the other hand ... with electronic ignition, bad plugs CAN cause upstream problems if left in too long. Basically, if the plug is bad enough, the coil can stay charged up all the time & never get discharged. Coils don't like that.