Sorry i hadnt responded. Ill definitely check out that link. Heres a bit more detail about what i know. I bought the car thinking i would be able to fix it. for 500 dollars. Ive checked fuel and spark. Both are present. The car came with all paperwork from the day it was bought as its a 1 owner car ...

1989 bonneville sse
No codes, no starting, nothing. just cranks. Mechanic said they ran all the tests they could and cant find anything. thats 2 different shops. Mechanic says he could get it to run for a few minutes then it would just die. Motor has less than 4000 miles on it. ecm is a replacement ...