1988 Chevy Camaro Got a code 43 from manual mil check

Was wondering if you guys could tell me what a code 43 from manually checking the mil, could possibly mean. The car is normally fine until I gun it or I use the ac and give it some gas, then the check engine light comes on and it runs like crap. Someone told me it was the ignition control module, does that make sense to you guys? Weird thing is my 94 Chevrolet truck with a 4.3 is throwing the same code but the engine light stays on? Can you help?