Recently purchased a 1991 with a rough running problem. The current injectors were amateurishly cleaned by the previous owner and the car ran well for about 25 miles and then began to run rough again. I am going to replace all of the injectors to rule out them as the problem. Incidentally the OBD reflects injector issues. I see that they come in 14, 17, and 19 lb ratings. Which should I use. If you think that it might not be the injectors feel free to advise.
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