ProTech Auto Systems is your trustworthy supplier of all ECM, PCM, and ECU CRKZ; CSTF; CWAF; CYCB; CYDU; CYUA; CYUB; DANW; DAPA; DBLK Auto Computers. These devices monitor the fuel, air, and electrical aspects of a CRKZ; CSTF; CWAF; CYCB; CYDU; CYUA; CYUB; DANW; DAPA; DBLK engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in.