[jackmech]

I have an O2 sensor bung in my exhaust and I'm using a heated 3 wire sensor. I was driving around today trying to see what was going on and I can't figure out what I'm reading. Fuel pressure was perfectly steady, although a little high (29.5 psi or so). I was reading the O2 sensor output with a voltmeter. At idle and full throttle the reading was what I would consider pretty good (around 0.7 to 0.8 volts). But what maintaining speed with the throttle just cracked and any mild acceleration things got really rich (around 0.1 to 0.2 volts). My next step it to get my injectors tested, but I'm curious if anyone has any opinions about my readings. It was quite odd to me that the readings were so varied from almost lean to rich.