HSTuners - View Single Post - check engine--EGR valve

*BlackDeuceCoupe* · 10-20-2001, 01:15 PM

I think you just figured out your "black exhaust" problem. The EGR valve is bad, triggering a 'check engine' light, which is keeping your ride from going into 'closed loop' mode, e.g. running too rich.

When all your sensors are okay, everything is functioning correctly and your engine reaches normal operating temperature, it will run off the O2 sensor[s]. If one thing is not working correctly, it will run off of the 'fuel maps' programmed into your ECU only.

When you are running off the fuel maps, your ride will run like sh!t, no matter what you do. I'd fix the EGR valve, reset the ECU and go from there.

Good luck!

10-20-2001, 01:15 PM	#2
BlackDeuceCoupe The Great Ape Join Date: Sep 2001 Location: Skull Island Posts: 774	I think you just figured out your "black exhaust" problem. The EGR valve is bad, triggering a 'check engine' light, which is keeping your ride from going into 'closed loop' mode, e.g. running too rich. When all your sensors are okay, everything is functioning correctly and your engine reaches normal operating temperature, it will run off the O2 sensor[s]. If one thing is not working correctly, it will run off of the 'fuel maps' programmed into your ECU only. When you are running off the fuel maps, your ride will run like sh!t, no matter what you do. I'd fix the EGR valve, reset the ECU and go from there. Good luck! __________________ Posted by BlackDeuceCoupe - 2oo0 Honda CiViC FBP HX cOUPe "Pay special attention to posts by BlackDeuceCoupe, the instigator of the forum, who does a nice job of breaking my column and responses down." - Paul Brink, ASU State Press DISCLAIMER The existence of BDC is disputable. The existence of views, in the absence of anyone to hold them is problematic. The existence of the reader is left as an exercise in the second order coefficient.