I've had my M62 with the reflash on my 05 Sunfire for a couple months now. For the past couple weeks it has been running so rich that the AEM UEGO can't read that high. Whenever I reach boost and sometimes no boost and partially on the throttle, the UEGO will creep up towards 10.0 then will read the 3 dashes. If I let off the accelerator, it will eventually read 10.0 again and work its way to 3 dashes again while decelerating. Any one ever come across this before? Is it the extra cold air from being so cold outside?
something doesnt sound right...
Is there a trouble shooting guide on their website to make sure its working? My innovate did 3 dashes when I installexd it. Turns out it was faulty and got a free replacement.
Boost leak?
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Mine had 3 dashes when I was richer than 10.0. But the tune on my car was garbage at that time. Never seen the 3 dashes since I have been properly tuned.
blackbirdracing wrote:^^ or exhaust leak?
this is what I'm leaning towards as well
Matthew Jollymore wrote:Mine had 3 dashes when I was richer than 10.0. But the tune on my car was garbage at that time. Never seen the 3 dashes since I have been properly tuned.
this is the GM reflash I can't retune
Exhaust leak would only be it if its before the narrow band o2 and them it could only do so much through the fuel trim. Boost leak could make it a huge amount if rich and depending where its leaking it might not leak unless in boost or heavy vac.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
AEM read's 3 dashes when it is lean. Not rich. Mine read's 10.0 no matter how rich I am. It sounds like you have a wiring or a sensor issue
LE61T PTE6262 Powered 
Mine went 3 dashes when I was 9:1 A/F and the 3 dashes flashed slowly as well, it did the same thing when I let off and it went lean.
IamQwibby (Eco Meatcake) wrote:AEM read's 3 dashes when it is lean. Not rich. Mine read's 10.0 no matter how rich I am. It sounds like you have a wiring or a sensor issue
But Its definitely not lean as my bumper and tail pipes are covered in carbon. What about it being unburned fuel from a misfire or something along those lines? raw fuel would not bonded to the o2 in there
Thats very possible. My AEM has never done anything then show 10.0 AFR when I am rich..
LE61T PTE6262 Powered
1. Is there or isn't there an exhaust leak?
2. How old is the sensor? If its been in use for a long while, and you have black build up on your buumper as stated from it being too rich, you may have killed your sensor.
3. The --- on decel may be normal depending on DFCO settings and the accuracy of the tune.
P&P Tuning
420.5whp / 359.8wtq
QWK LN2 (needs an @ss whoopin) wrote:1. Is there or isn't there an exhaust leak?
2. How old is the sensor? If its been in use for a long while, and you have black build up on your buumper as stated from it being too rich, you may have killed your sensor.
3. The --- on decel may be normal depending on DFCO settings and the accuracy of the tune.
I'm pretty sure the Tsudeo header is leaking
The sensor is only 6 months old
the --- on decel is normal
Mine did the --- when it went pig rich on a cold start one day it had the --- and the sweeping less went to the green side. So it can do the --- for rich.
