4 O2 sensors on a O2 enhancer??

[hydrotinkerer]

2001 GMC Savanana van 3500 5.7 litter.


Ill look at that thread closer.

The EFIE you purchased will work for your o2 sensors. They are narrowband sensors. Usually the signal wire for GM is purple. Test for voltage between
.1 - 1 volt engine hot and running. Voltage will constantly fluctuate up and down.

[Roland Jacques]

Thank you much

[hhocavalier]

not to steel your post but i have a question, what happens if i was to put a .45v to my ecu threw the o2 wouldent the ecu see this as perfect mix and not try to ajust?

[donnylynn]

not to steel your post but i have a question, what happens if i was to put a .45v to my ecu threw the o2 wouldent the ecu see this as perfect mix and not try to ajust?

As I understand it, the ECU is expecting to see a constantly changing signal from the O2 sensor, swinging above and below .45 volts. It would interpret a steady .45 volts as an error and assume the sensor has failed.

[hhocavalier]

what if i dont cut the o2 i simply add in a .45 volt so it will still fluxuate but wont dip below .45