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Thread: mustang GT 2007 single turbo

  1. 03-08-2011 #1
    SultanHassanMasTuning
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    mustang GT 2007 single turbo

    i have a single turbo mustang and with 42lbs injectors and its all be scalled properly. whats weird is that i tuned the car and start up and perfect and idles @ 14.8 for like 20 seconds and then i go to the scanned and i see these two codes. all of a sudden it it goes to 11.6 afr at idle. i erase codes and it goes back to normal again afr. i went into the DTC and click no error reported and still does that same thing.

    single turbo from ON3PERFORMANCE whats the cause of this. and i know the issue is these codes but its not going away.

    also when it goes rich like that i just step on the gas and then everything is back to normal happens only when idling for like 20 seconds.

    thanks.
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  2. 03-09-2011 #2
    SMOKINV8
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    Keep an eye on your fuel trims. Either you have an exhaust leak, or the O2's are bad IMO.
    2016 Camaro SS
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  3. 03-09-2011 #3
    1998Ws6
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    Where are the o2 sensors and what do the fuel trims do when it goes closed loop. I would guess the bank to bank variance is high or the pcm defaults one o2 sensor data to be bad due to how the system is Y'd to a single turbo.

    Ryan
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