94 suburban won't start

Ok my 94 suburban 1500 wont start. bone stock no modifications. It started developing a hard start about a week and a half ago and yesterday it would just turn over and not fire. But when it did run it ran great. Fuel pump is working and is pulsating gas into intake. Its getting spark. Fuses are good. I sprayed starting fluid in it and it did nothing. I'm going to clean the electrical conections in about 30 minutes. It has to be simply i just can't figure it out any help would be greatly appreciated.

Dan

cleaned all the connections still nothing
Can i swap the ignition control module from my 89 s10 with a 4.3 to see if thats it? they look the same.

fixed it was a bad ground

fixed it was a bad ground

thats what i was going to tell to check and see if it had a good ground. so i see it was and your on the road again.