hey guys, looking for insight on this bastard 97-98 Trans am ive been tuning. Ended up putting new oxygen sensors in it so it would actually enter closed loop. Well now that it does, it surges like hell and runs like crap. Running it in Open loop seems to be the only way to get it to idle worth a damn. I tried Open loop Speed density and it surges like crazy but when running blended VE/Maf it runs great. No idea what the deal is. below are the mods and the file as well. If anyone can help, I would appreciate it. I really would like to send it out in closed loop but at this point ive tried everything with no luck. Thanks! (first file is closed loop file and second is Open Loop file im running currently)
98 trans am
SBE 5.7
MS3 cam
Trick flow heads
92mm Fast intake/throttle body
vararam ram air filter setup
255 in tank pump
green top 42lb injectors
longtubes, 3" y pipe, borla catback
4l60e
Yank 4400 convertor
10 bolt 3.42s