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DFI and ECMDiscuss all aspects of DFI (Digital Fuel Injection), ECMs (Electronic Control Module), scanners, and diagnostic equipment. Fine tune your Third Gen computer system for top performance.
Hey guys, have an ECM out of my '91 305 TBI that I need some help confirming details about. I tried looking up the numbers on the tag but didn't have much luck. Here's some pictures of the p/n, and Prom. From "testing", I know it isn't limited at 95-99 MPH like I'd expect on a 305 TBI RS, so was wondering if it may be out of something else. PROM looked like a stock Delco unless I missed something.
