Empowering Professionals with Normal Sensor Readings For Enhanced Performance

Getting 12.1inHg at idle in drive, 29.2inHg at WOT. Normal? Image. - 2002 GMC Sierra Denali Quadrasteer ... Normal O2 Sensor Voltage Readings. The normal voltage range for an O2 sensor fluctuates between 0.1 and 0.9 volts. This isn't a static reading ... If the upstream O2 sensor voltages appear normal (cycling) and the downstream voltage is tracking the upstream O2 voltage then your cat is bad. ... normal fuel trim values in closed-loop. When we encounter a MAF sensor-equipped vehicle exhibiting these symptoms, we need to check for unmetered airflow first. about 1.8g/sec per liter. This is sort of my personal rule of thumb and what I do, no guarantees with this. I use a value of about 1.7g/sec to ... ... sensor, at 2000 rpm SHRTFT was -5.5 LONGFTF was 12.5. At normal idle 700 rpm, SHRTFT was between 0.0 and 2.3, would often read 1.6. LONGFTF ... Anyway, the downstream O2 should be somewhere in the middle (0.45V) if the cat is still there. The AF sensor though, as per the FSM, fluctuates ... As far as I understand it, the only type of vehicle that is going to have a steady reading when you read the output of the O2 sensor is if you ... On the downstream oxygen sensors you will want to see around 600mv-800mv without large fluctuations will indicate a good sensor. The 950 when WOT may be a little high, but that's based on your tune. The jumping around while normal driving is completely normal. That's the way it's ...