ok well i finally got my downpipe welded back together and reinstalled the O2 sensor. however, after resetting my ecu, as soon as my car started to boost the CEL came back on. i checked it and sure enough, 41. so could it be that because im running an FMU (yeah i know they suck, =death, will blow up my motor, etc.;please i dont want this to turn into a lecture on why i should not be using an FMU, ive had plenty of those already and it will be replaced soon) that its making my A/F ratio way too rich and thats why im throwing a O2 sensor code?
are you runnin a bypass valve to your map? if not thats prolly why. positive manifold pressure into map = CEL and limp car.
yeah im running check valves and im not getting a map sensor code just an O2 code.
reason i asked is because your map can make your ecu throw alternate codes, and how you said when you go into boost it comes on.
are you running any aftermarket injectors ? cuz a fmu shouldnt make you run real rich…
if you have access to a friend or something to a wideband i would find out your real a/f and see if thats what it is.
i dont have one but ill see if the shop that im going to check out tommorow does. im pretty sure that the map sensor isnt the problem but who knows