Extreme rich condition - ZR-1 Net Registry Forums

Perry Mitchell · 06-25-2020

Before any work was done and before the plenum was removed, the motor ran extremely rich. After talking with Marc and Jerry, I removed the plenum and eliminated the complete secondary system. I replaced all the injectors with FIC ones and the fuel pressure regulator with Jerry's new and improved unit (which I have to say is a work of art). The prom was re-calibrated by Marc and a resistor was installed between pins B22 and C18 on the computer which got rid of the code 66 that I had. I now have NO codes but still have the extreme rich condition. I suspect a failed sensor or vacuum leak but with all the vacuum stuff removed and ports capped off, I am at a loss. Any ideas?

06-25-2020	#1
Perry Mitchell Join Date: Nov 2018 Location: Washington Posts: 98	Extreme rich condition Before any work was done and before the plenum was removed, the motor ran extremely rich. After talking with Marc and Jerry, I removed the plenum and eliminated the complete secondary system. I replaced all the injectors with FIC ones and the fuel pressure regulator with Jerry's new and improved unit (which I have to say is a work of art). The prom was re-calibrated by Marc and a resistor was installed between pins B22 and C18 on the computer which got rid of the code 66 that I had. I now have NO codes but still have the extreme rich condition. I suspect a failed sensor or vacuum leak but with all the vacuum stuff removed and ports capped off, I am at a loss. Any ideas?