AEM tech support can't figure it out, can you?
04-30-2014, 07:54 AM
#21
Boost Czar
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Join Date: May 2005
Location: Chantilly, VA
Posts: 79,501
Total Cats: 4,079
I had an AEM sensor that failed, it would gradually get leaner and leaner up until the point it would PEG lean, and no matter what the car did it was 3-4 points leaner than it should have been. It would start out fine the next day, but at the end of the day it would return to showing leaner than it actually was.
Replaced the wbo2 sensor, same gauge/controller and it works fine now.
Replaced the wbo2 sensor, same gauge/controller and it works fine now.
that's how the sensor on my LC1 failed. I kept adding fuel, to the point it would backfire if I stepped on the gas from so much fuel being dumped in.
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05-06-2014, 02:29 PM
#23
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Join Date: Aug 2013
Posts: 68
Total Cats: -4
OK, after 2 controllers, 2 sensors, 4 power sources, and 4 ground sources, I have determined that it was infact the tune just I like told you guys! 
I am surprised that the car ran as well as it did with that lean of a tune. I thought the modest reduction in power was attributable to an overly conservative base ignition tune. Now with far better AFRs, the car is a little smoother and faster. I am also surprised that the mspnp9697 base tune was so lean out of the box.
I did not hear any noticable knock, and I did not drive the car very hard, but what do you figure the chances of me detonating with AFRs about 17+ in an NA set up? Hope I did not damage the motor.
So Curly and Nitrodann, if you are ever in Vancouver, Canada, I will take you for a beer at the fountainhead pub on Davie.
I am surprised that the car ran as well as it did with that lean of a tune. I thought the modest reduction in power was attributable to an overly conservative base ignition tune. Now with far better AFRs, the car is a little smoother and faster. I am also surprised that the mspnp9697 base tune was so lean out of the box.
I did not hear any noticable knock, and I did not drive the car very hard, but what do you figure the chances of me detonating with AFRs about 17+ in an NA set up? Hope I did not damage the motor.
So Curly and Nitrodann, if you are ever in Vancouver, Canada, I will take you for a beer at the fountainhead pub on Davie.
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