I put did a TBI conversion on a crate motor and put it in my 72c10.. it was running great for about a year and then starting to have phantom intermittent problems during acceleration. Went through every wire, rebuilt TB, every vacuums tube, consistent fuel
pressure, two fuel pumps and redid intake manifold twice.. No error codes are present. I cannot find the problem? Now I have given up and took it to a local shop.. they are hesitant to look at it because of the custom wire harness for tbi.. they are now telling me that they suspect the ECM to be faulty. I appreciate their effort but I feel that hey are guessing the the problem and not providing evidence as to the cause? I do not have a spare ECM lying around to do a test swap. Does anybody have a known method to test tbi ECM? It is a 1227747. Or possibly any other info or ideas. I have given up. Thanks, Tyree