Solving Automotive Performance Issues
We talked about intake leaks, but what about exhaust leaks? Can an exhaust leak affect performance? Yes it can, especially if it’s a leak before the O2 or AF sensor. If there is a leak in this area, it will give a false reading to the O2 or AF sensor, thus upsetting the fuel mixture. So if you have poor fuel mileage and an exhaust leak, you might want to address the exhaust leak and recheck your fuel mileage after the repair. The improper fuel mixture created by the leak can also cause performance problems, so don’t rule out your exhaust leak causing a problem.
More information on how to find exhaust leaks can be found in the Noises article.
Lastly, if you have O2 sensor codes indicating a lean mixture, don’t replace the O2 sensor. Look for exhaust or intake vacuum leaks first, repair those, and recheck for your codes.
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
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Written By EricTheCarGuy
Edited By Julie Hucke
Video Title: Solving Automotive Idle Problems – EricTheCarGuy Video Description: In this Article, Solving Automotive Performance Issues, Eric looks at what can be the cause of Solving Automotive Performance Issues with your vehicle .Thumbnail: http://www.ericthecarguy.com/images/faq_buttons/Large_FAQ_Images/Performance-and-Driveability-icon-large.png