Error code 27

I have a 1988 caravan that has a problem that I have been about to pull the rest of my hair out. Its a fuel injector control circut that I cant figger out and have given up and taken it to a mechanic and all he could do was scratch his head. Any ideas?

Well, someone must have done something - you, then mechanic - to at least try to figure it out. So before people waste a lot of time suggesting that you do things you’ve already done, how about you tell everyone what has already been tried to “figger” it out.