So the main two things to take away are the downward sloping line caused by 2 things, rich mixture or low/no compression (smoothness of pattern points toward compression); and that relative compression is such a powerful tool because of the speed to information ratio. It something we should all be doing on all misfire cases really. Quickly check the integrity of the engine itself, then we can move on to ignition and fuel. I’m no secondary expert, just sharing a waveform characteristic I’ve found to be 100% true. We should all be trying to read and use primary and secondary voltage waveforms, they tell you what’s going inside the chamber during combustion. Don’t need expensive equipment either, #AESwave#Uscope is an affordable way to get started.
#tbt to my first subaru. Some of you guys out there know how much this car meant to me, had it for almost 10 years and went through 3 transmissions, 2 engines and sat with no engine for about 2 years at one point.
Only the finest tools to work on, Well a Fiero. Learning, working, and having a great time doing it. A man's worth is on his hands. Every scar has a story. Every busted knucle makes money.