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Originally Posted by ffvetteman
I am not sure that they are bad at this point but it is a guess.
After I replaced the ECM, it was running fine for a bit, but then I could feel a pretty major loss of power under load. When I got toward the top of the RPM range, it would throw a check engine light. I ran that code and it said "lean fuel" (I forgot which code it was).
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I had the same issue on my 90', turned out to be a bad fuel pump. Replaced both of them, problem solved. By all means check your injectors too, but I think you'll find the fuel pump is the issue. If you haven't already done it, replace the fuel filter before you do the fuel pump test. A clogged filter can cause the same problem.
Hans