Posted to the Waveform Library on 1/10/2022

Run with no oil filter for 15 minutes. Had 165psi compression. Scan tool reported no codes, good cam/crank sync., zero degree cam retard desired and actual but no coil or injector command. As you can see, the cam lobes tell a different story. I guess in the scan tool's defense, the cam's are sync'd. Just not in the way that the engine can breath.

William Schroeder
Owner/Technician
Schroeder's Auto Service
Tucson, Arizona, USA