We probably won't hear back from
@2burbfamily as to what fixed his so no sense in putting in my .02 on that one. What did fix yours
@1987 GMC Jimmy ??? Was it the ICM???
ICM was bad so I replaced, and it actually fried my passenger side injector in the moment of failure so I had to order one, which that’ll be here Monday. I tested the injectors using a 9V battery to ‘buzz’ them to see if I could hear the bad one as being weaker or completely nonfunctional compared to the good one, and I also tested the resistance, which the good one passed with flying colors, and the inoperative one failed badly.
Obviously when a guy says he went full blown "parts changer" instead of properly diagonsing the issue he went into full blown panic mode and did also mention it's his daily driver so he probably needs it running ASAP since it may be his only ride to work. I'd imagine it's fixed by now but sometimes these posts are left for after the initial problem is solved. 
