Quote:
Originally Posted by Kool-aid-82
I double checked and tested the Frequency valve relay, on the bench,
Good.
I can feel it vibrating and I disconnected the relay with the car running and it drops RPMs. Conclusion - the Frequency Valve is working.
Once warmed up if I Connect the lambda the car drops RPM and runs bad. (Leans out to ~20.0)
Lambda disconnected runs good
AF mixture at startup is ~13.6
Warmed up it is ~14.6
Summer in houston so there is not a-lot of warmup needed.
Took some time to work on the Sunroof mechanism as well - but that is another post. |
Sounds like you have made good progress isolating the problem.
1.) O2 Sensor
2.) Wiring short- from O2 sensor to ECU.
3.) ECU - circuit that reads O2 sensor voltage.
Once warmed up if I Connect the lambda the car drops RPM and runs bad. (Leans out to ~20.0)
One possibility (my best guess) is that you have a shorted wire on the O2 pigtail. Could have happened when installing the SSi's, removing the O2 sensor. If the ECU reads a higher voltage (.1-.9v range), closer to .9 which is a false O2 reading, the ECU will try to lean out the mixture.
So, test the O2 sensor, (I would replace it). Also, I would buy another O2 relay, and keep the current one in the glove box as a spare.
It this doesn't solve it, start looking at sending the ECU out for testing and repair.
Let us know.