check engine light

[kev777]

i have a 93 sho, easy driving i get no light but when i run it hard for a while the check engine light comes on.
It still runs fine and when i shut it off and start it again no light.
Would this be a faulty o2 sensor or maybe the mas doing this?????

[sfontain]

Originally Posted by kev777

i have a 93 sho, easy driving i get no light but when i run it hard for a while the check engine light comes on.
It still runs fine and when i shut it off and start it again no light.
Would this be a faulty o2 sensor or maybe the mas doing this?????

Go to AutoZone or some other very large chain auto parts store and have them read your diagnostic codes. It should be free. When you get the codes, come back and let us know what they are.