my car is still running rich even with its new o2 sensor. about -2 to -5 both short term and long term at idle and gets higher wile driving or accelerating up to -10 wile crusing at 3k rmp in 4th.

iv read online to check the map sensor. can some one help me out with this i have a multi meter but no vacume pump is there any standard reading it should be at at idle and under throttle in neutral?

i unpluged the conector from the sensor and one pin is 0 volts(guessing ground) and one pin is 5.07 volts (guessing power) but the other is 4.8 volts... im asuming signal but should that one even have a signal voltage if its unpluged?

either way i put some back probe pins in the conector and it read about .8ish no throttle and up to 2.8ish when snaping the throttle open.

 

might help out or point you in the right direction

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/map-sensor-test-1998-civic-done-correctly-3004860/