Spark plug knowledge is essential

[astridtaylorub]

As I have a cat-detailed exhaust system, I use an unwired driver to keep the frequency valve set to 50% duty cycle, and the fuel pressure is checked and within specs. In addition, WUR is following all specifications. The engine starts and runs smoothly, but there is a hint of richness according to the plugs and a smell of gas in the exhaust. This plug exercise is to get a good start on fine-tuning the mixture before the AFR installation today or tomorrow, and it will also prove to my obsessive-compulsive disorder that I will no longer be?rich. If the AFR indicates that the mixture is good, I will not do anything further than clean the plugs, drive, and re-inspect them a month later.