Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Do you still have the original PCM and TBI? With no O2 sensor, it's running in Open Loop and won't fine tune the AFR. With an O2 sensor, IF everything else is good, it'l go into Closed Loop and adjust your INT (Integrator) and BLM (Block Learn Multiplier), also known as Short and Long Term fuel trims. So, yes you need an O2 sensor.Should i add an O2 sensor?
Yes on the original PCM and TBI thank you for the reply.Do you still have the original PCM and TBI? With no O2 sensor, it's running in Open Loop and won't fine tune the AFR. With an O2 sensor, IF everything else is good, it'l go into Closed Loop and adjust your INT (Integrator) and BLM (Block Learn Multiplier), also known as Short and Long Term fuel trims. So, yes you need an O2 sensor.