Crank / Cam Signal Emulator

[kidturbo]

That's what I had in mind. My little $30 Saleae knock off doesn't give ya voltage to duty. But I might grab my buddies SnapOn scope and log both a stock truck and this bench setup to see whats different.

I really want to replicate that misfire issue we experienced to rule out any reflector or harmonics related issues before I go hammering on those boat engines. When both engines shared same dyno harness, and one misfired violently, and the other logged misfires but ran fine, makes ya wonder.

 

[2004LB7]

Is it possible it was just the infamous belt static electricity issue you got on the dyno but not here because, well no belt?

 

[kidturbo]

We went over it end to end checking ground resistance, battery banks wiring, ecm grounded, ungrounded, nothing made a difference. Then when we setup the second engine, we lifted the bail connecters up and away from the injectors, and it never cut out once. Neither engine had a factory bail mount on the cover, so they were laying on the injector lines.

After showing the scope capture of misfires to a few engineering minds, they all concluded it was most likely interference by the pattern.

Sent from my SAMSUNG-SM-G890A using Tapatalk

 

[2004LB7]

Sounds like a little foil rap could have helped that