× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Cam/crank known bad
Posted to the Waveform Library on 10/23/2020

At first I thought that the humps were noise or CEMF feedback but the "humps" are directly under cylinder 1&4 ignition trigger events and there are no humps over cylinder 2&3. I'm suspecting stretched timing chain (cylinder head has been skimmed twice which co...