Monday, June 16, 2008

Commenter Alcohol explains the Check Engine Light

the CEL is often triggered by the trim being out of boundaries rather than actual lean condition.

With all vehicles however- the concern is not likely to be in closed loop operation- the concern likely would be in open loop such as WOT that you might go too lean unless the ECU has a learn ability for open loop. Larger injectors are often used in performance applications to insure full power and stoichiometric conditions at WOT.

Interesting. You know Al, I used to be an actual, honest to god automotive engineer, and I don't know this stuff. How do you know all this?

The Scangauge will tell you if you are in open or closed loop, in addition to trim and O2 sensor data.

I have to think that the way that I drive, I am very seldom in open loop.

No comments: