AEM Wideband Full Lean at Idle after Turbo Install
Evolved Member
Joined: Apr 2011
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From: US
Newbie
Joined: Aug 2007
Posts: 32
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From: BARBADOS
you probably have a leak before the wideband o2 sensor location.
check exhaust manifold gasket,
turbo flange gasket, o2 dump gasket etc etc for leakage. air is leaking in the exhaust stream and skewing your readings at idle, when u press throttle u increase the exhaust velocity which then makes the wideband go from full lean to the state u see.
a missing o2 sensor will most likely make the car run richer on idle not lean.
check exhaust manifold gasket,
turbo flange gasket, o2 dump gasket etc etc for leakage. air is leaking in the exhaust stream and skewing your readings at idle, when u press throttle u increase the exhaust velocity which then makes the wideband go from full lean to the state u see.
a missing o2 sensor will most likely make the car run richer on idle not lean.
you probably have a leak before the wideband o2 sensor location.
check exhaust manifold gasket,
turbo flange gasket, o2 dump gasket etc etc for leakage. air is leaking in the exhaust stream and skewing your readings at idle, when u press throttle u increase the exhaust velocity which then makes the wideband go from full lean to the state u see.
a missing o2 sensor will most likely make the car run richer on idle not lean.
check exhaust manifold gasket,
turbo flange gasket, o2 dump gasket etc etc for leakage. air is leaking in the exhaust stream and skewing your readings at idle, when u press throttle u increase the exhaust velocity which then makes the wideband go from full lean to the state u see.
a missing o2 sensor will most likely make the car run richer on idle not lean.
Newbie
Joined: Aug 2007
Posts: 32
Likes: 0
From: BARBADOS
your mixture isnt actually that lean, the wideband is just detecting the external air from the leak. i wouldnt advise a tune up until all leaks are fixed.
Last edited by superkizuna; Mar 17, 2014 at 12:48 PM.
What does the stock ECU have to do with an AEM UEGO O2 Sensor? The ECU has absolutely no direct control over the sensor. The factory O2 Sensor, the one on the O2 Housing has nothing to do with the UEGO either bro. The secondary factory O2 has been umm.... removed and replaced with the stunningly accurate AEM Wideband O2. BTW the first sensor in the setup is alive and well. Installing an new turbo won't kill my sensors but it will kill radiators lol.
UPDATE:
I just got a radiator ready to pick up tomorrow. So that will be fixed but the entire tuning process is going to be dicked up if I can't get that freakin gauge to cut it out.
UPDATE:
I just got a radiator ready to pick up tomorrow. So that will be fixed but the entire tuning process is going to be dicked up if I can't get that freakin gauge to cut it out.
So this means the OEM O2 sensor on the o2 housing is intact and fine correct? During a turbo install it is easy to mess up a o2 sensor due to the location on the o2 housing......swap out the OEM sensor on the o2 housing for a new one and report back and fix the gasket at the same time
If its a bigger turbo it will read lean hence more air flow..but i think you have an exhaust leak think about it what else could it be?
Last edited by Revo15; Mar 17, 2014 at 06:24 PM.
Okay so, I'm going to get my gasket between the turbo and o2 housing replaced. I'm going to head over to Moore Automotive and just get all new metal gaskets. Did the soapy test and bubbles were shooting out of that spot. Some of the suds literrally shot out of the the bay-- so I'm thinking that's the spot.