Ford. CALL NOW! 1-877-764-5402. ProTech Auto Systems is your trustworthy supplier of all ECM, PCM and ECU ford Auto Computers. These devices monitor the fuel, air and electrical aspects of a ford engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in. Your Ford F150’s ECM (Engine Control Module) is its brain. Just like a human’s brain, your F150 can’t function without it. It is sometimes referred to as the ECU or PCM. It’s all the same thing. The ECM controls and directs your entire drivetrain (unless there is a serrate transmission controller). When an ECM starts to go bad, it can.