check engine w/ lt's

ok so after 7 hours (3 spent hacksawing my y pipe out cuz i wa too cheap to buy a sawzaw) i got my longtubes on everything seems good but when i started the truck the check engine light has come on, but i dont see it flashing a code just the light is on. when i started it i didnt have the why pipe on yet could that maybe cause it cuz it was about 65' out last night and the o2 was getttin some cool air? rear o2s should be cut off with tune, is it possible i fouled one of the fronts? or maybe a spark plug? it doesnt seem to be missin or idlein real real rough

the light came on right away? Even if the rear 02's weren't turned off, it takes some driving to thro wth code.

Without the y on, maybe too much heat loss for the front 02's.

yeah the light came on while it was still on the ramps i started it to check for leaks before i put the new y on it was 62-65 degrees last night

what is the code?

i havent had a chance to check ill get the y on this afternoon then run up to autozone and see what they say

Did you plug in the tune before you started the truck? If so then you might need a crank relearn. Or another possibilty is if you didnt pull your plugs out when installing them you might have smacked a plug with the header and cracked it? That happend to me and it drove fine everywhere except light throttle where it would stumble which I had no idea what it was at first because I didnt realize I had a cracked plug. Maybe one of your plug wires isnt on all the way?

if its just a crank relearn needs done then thats easy to do if you have access to HPTuners or EFILive. I'd say drive up here and I'll do it for you but Denton is quite a drive from Stephenville.

Unless you specifically told nelson to turn off the rear O2s they won't be off. Did you unplug any sensors while doing the swap?

This thread is pretty pointless until you read the code and find out what it says.

i got it checked this moring the code its throwing is "lean in bank 2" i checked the plugs they look good...........could it be the front o2? would bank 2 be the passenger side?