I have a 2002 Dodge Intrepid, I was told it needed a new ECM computer. I bought a re-built computer, my VIN was imprinted in it, and now my car will not even stay running. It started, revved to about 1200 rpm and died. I have had many different mechanics look at my car and the don't know why it's not running with the new computer installed. What else do I need to do? PLEASE HELP. I cannot afford to continue to pay $$$ for people to tell me they don't know what's wrong.