detroitmuscle

I hooked my scanner up to my 97 camaro ss and viewed the live data. It smells like the car is rich and when I'm just cruising it almost feels like its floating around the throttle a bit. Both STFT's looked fine to me and one of the LTFT's looked good around 7 or so but the other side read 25 throughout the datalog........I have no idea what to do. Car runs good at rpm and I have a mail tune from ion at madtuner but I was going to take it up to the dyno and have it tuned live with a wideband so its perfect but I don't want to have a problem before I go up there. Any help is appreciated

bobdec

If it smells rich them it looks like the you either have an ignition (non firing plug) or the O2's are not reading correctly. The O2's are reading lean so the PCM is adding fuel +7% on one side and +25% on the other (you did not identify left or right). (To the OBD1 crowd reading this means LT BLM's are at 136 and 160). IMO adding 25% fuel for lean is one cylinder not firing (raw fuel reads lean) or I have seen #6 and #8 wires swapped. You did not give your mods or any work done to the car recently or prior to the rich indications. Anything we should know ?? . I would get this resolved before going for the $$$ dyno tune.. otherwise they will have to fix it prior to doing any tuning. It could be something simple like a burnt plug wire.. Are you getting any DTC's ?? misfires ?