Hi I have a 1991 Buick Century and I can't get it to start it turns over but won't start I replaced the crank sensor and nothing was told it was the coil pack but that I should check the ICM first, I price checked those ICM'* and they are more expensive then the coil packs. Is there a way the ICM can be taken out and clean the contacts and if so how do I go about doing that and if that'* not the problem how do I test the coil packs to see which one or all 3 is out? HELP! Frustrated in Arizona...

https://charm.li/Buick/1991/

Need to check for spark and fuel pressure. Fuel pressure would be easiest if you have a gauge handy or can borrow one.