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I've covered the four major categories that cause engine performance issues: computer control failures, emission control failures, ignition problems, and mechanical failures. Keep in mind that performance issues can come from all sorts of sources; the trick is to not overcomplicate things. You might find yourself chasing down what you believe to be some complex electrical problem. Avoid this thinking and remember the rule of K.I.S.S. It's only complicated if you make it complicated. Check the basics, check the oil, and make sure the tune-up items are in order. Here is a video series on how I diagnosed a performance issue on my Subaru. It's a great series that covers much of what was discussed in this article.

Solving Performance Problems 1

Solving Performance Problems 2

Re Performance Problems

I hope this information was useful to you. If you didn't find what you were looking for, type in a few key words into the search at the bottom of the page. You can even type in specific check engine light codes. In addition to the code meaning, you might find articles and forum posts that pertain to that code. If nothing comes up for your issue, sign up for our forum and ask your question there. We'll be happy to help if we can. It's free, and all you need is a valid email address. Just be sure to respond to the confirmation email to complete your registration. If you don't see the confirmation email, check your spam or bulk folder.

Stay Dirty

ETCG


Written By EricTheCarGuy
Edited By Julie Hucke