Actually....this is not the case any longerconcoursd wrote:Lambda and A/F are measurements of the same thing using both sensors so if you set both gauges to one or the other it would be like have two identical gauges at all times which is not useful in my opinion. Lambda is totally not useful because it based on the assumption that a lambda value of 1 = an A/F of 14.7. A/F ratio = lambda x 14.7
Usually the lambda shown with the predator or the trinity is the commanded (intended) value that the PCM wanted. If that is the gauge you have pulled up along side the new a/f ratio gauge then it may be useful to see if the lambda (commanded value) matches the actual a/f ratio picked up by the sensors.
Lambda is how the PCM calculates AFR, it dont know AFR from a hole in the ground...
The PIDs shown here are one bank in Lambda and another bank in AFR. Its actual AFR, not commanded.