I was testing my Lambda system today using the tests on page D:04:15 of the workshop manual and it didn't really pass any of them. I was using the method where the rpm relay is jumped to power the lambda system.
1st test: Meter read 40deg steady on the test where the O2 sensor is disconnected. (Should be 45 steady)
2nd test: 10deg steady on the test where 1.5v is applied to the connector. (Should be 20 steady)
3rd test: With the connector grounded to the frame, the needle spiked up to 70deg and then fell back to 20deg and stayed. Even though it fell back to 20 the noise that the freq valve was making stayed consistent, a low buzz. (Should be 87 steady)
Any thoughts? Maybe a bad ground or bad ECU?