After putting in a new computer and prom into my 1991 Pontiac Firebird. I have changed the plugs and wires, Cap and Rotor, Radiator Fluild, Oil and Filter and Transmission Fluid and Filter. I now have a check engine light on my dash. What could this be and How do I fix it? I had no check engine light at all after I changed the computer or anything else until I changed the Tranny Fluid and Filter today.

Look in FAQs for how to find out what code you have. After you find out what code you have we can help you fix it.

what code is showing up? lol its prob just something stupid like "clear your computer" type thing.