Rev: Did it hit that low rev limit before the fuel pump change? It's possible the speedo not working has something to do with the rev limit. (unsure)
Radiator: I assume you mean the fan. Turn car on. Hold RPMs at 3krpm for 45 seconds. Fan should turn on. If it never came on, you would overheat, and life would suck. My Civic did that once.
speedo: VSS on the tranny could be bad, also, could be bad wireing IE never installed.
door: Not really much info to go on here, does the handle work? can you not open it from the inside or outside?