On my '98 Expedition 4.6, the engine turns, but according to the local repair shop, is not getting spark or fuel. When you take the key out, there are still some dash lights on. They think it might be the computer, but want me to take it to ford. I thought maybe I could buy the computer and try myself. Where is it located on the truck and where can I get a replacement.

 

Located far passenger side going through firewall. You should be able to see the large connector plugging into it from the engine compartment.

You can get them aftermarket but OEM is preferred.