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My full rich problem is back!!!!

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Old 03-15-2013, 08:23 AM
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My full rich problem is back!!!!
went out to log today everything was running perfect and then it pegged out 10.0 again im about ready to crash this mother ****** into a wall and just get another car.

Recap on what iv done so far.
I have no cels when this happens
cleaned maf and map sensors.
changed spark plugs to copper type.
James said may be a faulty upstream o2 sensor so im install this new one I have today but I always thought faulty o2 sensor throw cels.
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Old 03-15-2013, 08:41 AM
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Force the car into open loop for a day and see if it dose it.
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Old 03-15-2013, 08:44 AM
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Is the car going rich during Wot?

Also run the car with only speed density only then try MAF only.
I wonder if u have something out of wack there..
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Old 03-15-2013, 08:48 AM
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ok i just looked into my logs and iv got a pic of my car doing a 2nd gear pull when its running normal and when its pegged rich ill post them and tell me what ya think.

update- uploading now.
Last edited by Vander Nars; 03-15-2013 at 08:55 AM.
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Old 03-15-2013, 08:57 AM
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2nd gear normal pull afr of 11.0


2nd gear pull pegged rich 10.0 afr
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Old 03-15-2013, 09:05 AM
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Something is happening in the airflow that causes it to jump from 8.77 to 41.00 and that causes my injectors to pump out more fuel from 65% to 86% does this help explain what is broke? lol
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Old 03-15-2013, 09:10 AM
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Well on the first pic ur car isn't at operating temp. 140*

The second one it is..there could be somethin there.
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Old 03-15-2013, 09:12 AM
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Put the car in speed density and see wat happends..
Wonder wat ur commanded afr is also
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Old 03-15-2013, 09:12 AM
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First pic cold motor? Also how can u be at 32psi and only flow 8 lb/min?
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Old 03-15-2013, 09:21 AM
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I hope hes not at 32 psi or that is one spun M62 lol
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Old 03-15-2013, 09:25 AM
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my car is not at 32 psi that is the airflow people lol. the car being only 140 does not effect the 8.77 ill post a pic of 3rd gear pull that is the same way.
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Old 03-15-2013, 09:27 AM
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Originally Posted by Tjolley
Put the car in speed density and see wat happends..
Wonder wat ur commanded afr is also
11.0 is what my afr is when its not ******* up and what is speed density and how to i put my car in it?
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Old 03-15-2013, 09:29 AM
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Bad 02 sensor
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Old 03-15-2013, 09:30 AM
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You have to subtract barometric air pressure.
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Old 03-15-2013, 09:31 AM
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Originally Posted by leemanfor
i hope hes not at 32 psi or that is one spun m62 lol
17.3?
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Old 03-15-2013, 09:33 AM
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Originally Posted by Tjolley
You have to subtract barometric air pressure.
Had a derp moment. Also thought he was Turbo swapped so 32 psi and 41 lb/min kinda lined up in my head lol.

Ok carry on haha.
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Old 03-15-2013, 09:33 AM
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this is a 3rd gear pull at running temps with a 8.91 ve airflow and 67 injector duty
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Old 03-15-2013, 09:35 AM
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Originally Posted by ULWizSS
Bad 02 sensor
upstream sensor? i have no code but im guessing that could be it lol
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Old 03-15-2013, 09:50 AM
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Originally Posted by 09BlueBaltSS
Had a derp moment. Also thought he was Turbo swapped so 32 psi and 41 lb/min kinda lined up in my head lol.

Ok carry on haha.
He's flowing 33.86 lbs/min (MAF)....

Sounds like a bad O2 sensor to me as well.
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Old 03-15-2013, 09:52 AM
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well im replace the o2 sensor today, do yall think that is whats causing the ve airflow(red one) to spike from 8-9 to 41 and making me dump fuel?
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Old 03-15-2013, 09:53 AM
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Originally Posted by Vander Nars
well im replace the o2 sensor today, do yall think that is whats causing the ve airflow(red one) to spike from 8-9 to 41 and making me dump fuel?
Yes. What did the old sensor look like when you pulled it?
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Old 03-15-2013, 09:54 AM
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Originally Posted by Staged07SS
He's flowing 33.86 lbs/min (MAF)....

Sounds like a bad O2 sensor to me as well.
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Old 03-15-2013, 09:56 AM
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Originally Posted by Staged07SS
Yes. What did the old sensor look like when you pulled it?
never pulled it yet iv got to get the tools after lunch.
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Old 03-15-2013, 09:57 AM
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Originally Posted by Vander Nars
never pulled it yet iv got to get the tools after lunch.
Ok.... Sounds good.

Post up your findings when you get to it.
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Old 03-15-2013, 10:34 AM
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Could be a slow sensor. Happened on a couple of cars I've looked at. I would replace it and report back.
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