I took my 2008 Titan to a licensed repair shop and had a low mileage engine installed. Mechanic called and said they cant get it started. He says there is fuel in the fuel rail, but its not getting through the injectors. He said he replaced the ECU relay but that didn't fix it. I called a local Nissan dealer to price a fuel pump relay, but was told you cant just buy that relay, you have to buy the whole new IPDM. I called a different local Nissan dealership and they said the fuel pump relay is $5. What else could it be other than either of these relays?? I'm at a loss!! HELP ME PLEASE!!!