88 Acclaim has problem with spark plugs fouling.?

It has 77K, isn't driven that much. I am original owner. Had it repaired, but the part was defective and fouled again, in 2 weeks. They replaced the part. That was 2 years ago. My brother in law, said something about a trottle injector but not sure that was the exact word he used. My husband put higher octane gas in it, which didn't help all that much. I know, I need a new car, but this one still looks good. Anyone have any ideas. My husband is just coming off of chemo and doesn't feel like being a mechanic right now. I need some advice from some good mechanics out there, before I take it to the garage for a check up first. Thanks guys!