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Discussion Starter #1
Hey guys, as title states I installed a cold air intake from eBay and am now experiencing a p0171 for bank 1 lean, had no issues before the cai I checked all vacuum lines and ensured to check the intake manifold bolts as well. Even tried an aftermarket jet maf sensor to see if it would be able to compensate for the extra air coming in but that didn’t help.
my long fuel trim at idle gets up to 21-24.2 I don’t know what else it could be or if I need to pony up for hp tuners and calibrate the computer
 

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Discussion Starter #3
Maybe simply send the CAI back ?
Thanks that was super helpful, I’d like to at least troubleshoot seeing as how a lot of people run cold air intakes on these trucks. I can’t be the only one with this issue there has to be a fix
 

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2004 GMC Envoy SLT 4.2
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Seriously , I don't see a need for any CAI . Maybe simple re-ducting if planning on deep water adventures , but , other than that why ?
Just because we can , doesn't mean we should . ;)
 
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