Hey guys, ok i need some help here because im clueless. Heres the deal, the camaro is a 350 TBI and for some reason when i start it up the car idles very weird. The car will only do this when you first start the car up and only for a few minutes, it smooths right out after throttling the car up a bit, it sounds alot like the car has a huge cam, the engine sounds very lopey, and i know its not right because the car hasnt always done this, it will also smoke greyish and black smoke while its running like this, until it gets warmed up, or smooths out then it runs fine. Im not sure if this is some kind of setting that might be off or possibly a sensor, so if you guys have any ideas please let me know, its kinda embarrassing to start it up and have it smoke like that, this things my baby please help me get it back running great. Thanks guys

 

If its showing black smoke that means its running rich. Maybe its running very rich in open loop mode? But once it gets into closed loop and the O2 sensor takes over it leans it out. What chip is in that thing..might want to check the CTS to.

 

the car has a custom chip in it, and it hasnt always done this, i drove it 3 hours to go see my g/f, and now ever since that trip it acts like this. And what exactly is the CTS ? My O2 sensor is new also so i know that cant be it, thanks for the help, if you guys have any questins at all ask away, im more than willing to answer any and all of them.