I have a 1999, 4 cylinder Chevy S10 extended cab and my Service Engine Soon light is on. At first, it would come on and stay on for a few days and then goes off for a while. Now, it stays on.
The truck runs really rough when it's cold. It acts like it's getting too much gas when I push the accelerator. I have to wait until it gets up to at least 200 degrees before it will run smooth.
I'm thinking that it's either an 02 or temperature sensor.
I had a couple of different people try to hook up to my OBDII port to check the codes but it reads NO DATA.
I found the link below and I need to know where the fuse is to my OBD II port.