73,000 miles on it. Transmission & all is fine when running. Took the ECM out replaced with a new 1. Wasn’t the problem...now needs flashed I assume,even if you install old back in? Then it turns over but won’t stay running. Not the fuel pump. Has been tuned up. New battery,was told throttle body could be the problem? Lots of new parts later...When it was running,ran perfect. Don’t know what to do,don’t want it just sitting...