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?? on tuning for fuel system

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Old Jan 24, 2007 | 03:08 PM
  #1  
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Mangled03gmc
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Default ?? on tuning for fuel system
Hey guys I have a 05 pcm .What needs to be done in order to have this pcm tuned for return fuel system if any. 05's had a returnless system.
Thanks John
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Old Jan 24, 2007 | 04:07 PM
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Originally Posted by Mangled03gmc
Hey guys I have a 05 pcm .What needs to be done in order to have this pcm tuned for return fuel system if any. 05's had a returnless system.
Thanks John
Return fuel systems have a vac reference FPR and as a result have a flat IFR table. Returnless will have a sloped IFR.
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Old Jan 24, 2007 | 04:16 PM
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I have a 06 Denali but Allen gave me a 04 PCM and I keep getting code for vent selenoid. Is this on the same lines due to the returnless?
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Old Jan 25, 2007 | 11:08 AM
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Anybody else
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