Hey guys,

Did some more datalogging and had overlooked a major issue.

This application is my boat.

350 CID
TBI with 16168625 ECM

I had the boat running down the river at WOT. Really moves out fast. I know that the Tach on the dash is correct. Engine is racing. It was running at approx 4900 RPM on my dash, yet my ECM logged only ~3600 RPM. How can this be? bad distributor?

Also at 3100 RPM on the dash, ECM is recording 2400RPM.

This would make sense as to why all my data is lean. If the ECM thinks it is only running 3600 when it is actually running 4900, would cause a problem.

Thoughts?

-Fallflight