Just purchased a 2005 Crossfire from the auction, Got it home and it started up twice and cuts off and the third time nothing happens, took it to the shop and i was told it was the rcm, but after doing some research I understand it might be the skreem , I sent it to modulegods and now theyre saying its bad and cant be repairable, and he needs me to send him the ecu and keys, my question is if the ecu is bad will it even turn on and cut off, also i was thinking the keys might be bad, Will bad keys have these symptoms, Please help