i got a little issue here with my 93. when i crank it up and drive it runs great with no problems but as soon as i get to a light and sit for two minute the check engine light comes on and it throttles up to like 1300 rpms and acts like it wants to choke out sometimes. i ran the codes before the light comes on and after the light comes on but nothing comes up for the light. any ideas anyone?

 

Check the fuse for the obd port if its bad you scanner wont tell you anythig.