I am a proud owner of A 1990 Camaro Rs 305 V8 5.0L. I have done some research and i believe it is going into Limp Home mode, but the car will run great for a while then as soon as the Service Engine Light comes on there is a huge loss in torque and acceleration. If i turn the car off and back on the service engine light is off and car runs fine. Just changed oil and air filters and the oil. Any Help? I plan on taking it to autozone to have them read the code, but who knows if the service engine light will be on then..