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06-25-2020
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#1 |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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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?
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06-25-2020
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#2 |
 
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,154
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Re: Extreme rich condition
How are you detecting the rich condition? Are you using a scan tool? if so, do you have logs?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-25-2020
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#3 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Re: Extreme rich condition
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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06-25-2020
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#4 |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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Re: Extreme rich condition
A code 66 is a power fault for the valet switch.
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06-25-2020
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#5 |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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Re: Extreme rich condition
I do not have a scan tool but what I did was jump the terminals A and B in the ALDL connector and it showed no fault codes, only the code 12. All the plugs are black and sooty and the exhaust is very black and rich. I can't let it run very long as it smokes us out of the area.
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06-25-2020
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#6 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Re: Extreme rich condition
Quote:
Dynomite, Need to add Code 66 to ur list of MALF in stickies.
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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06-25-2020
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#7 |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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Re: Extreme rich condition
No, have not checked the coolant sensor. Can I do that without removing the plenum? It is rich right at startup.
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06-25-2020
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#8 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,450
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Re: Extreme rich condition
Were the FIC injectors new or rebuilt?
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06-25-2020
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#9 | |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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Re: Extreme rich condition
Quote:
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06-25-2020
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#10 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Re: Extreme rich condition
Also, have u looked at Fuel Pressure Regulator. Can u put an FP gauge on the right hand fuel rail?
__________________
[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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Linear Mode
