Just put my car back together. Put on the headers, cat, exhuast, intake gaskets, plugs and wires. Now for some reason the SES ligt is on and it was not on before. Any ideas on why?

 

Dude before people start pulling out reasons, because it could be anyy thing and every thing for all we know, get that car scanned. Then you will know what it is for sure and wont go blindly wasting money or throwing money at the car.

 

It could be just about anything. Take your car to Autozone, they'll scan it for free.

 

I think AZ is only scanning OBD-II cars (96-up). It would be rare to find one that could actually scan a 1995 anyway, because of the hybrid connector/diagnostics.