Corvette TBI, Help with Ignition Spike during AE

[dave w]

The timing spikes should not be affecting the engine.

It can be very challenging to figure out what is causing the spikes. Below is a list if things I would try.
Data log with a different laptop.
Data log with a different ALDL cable.
Data log with a different ECM.


dave w

[Thainglo]

Good tips, Dave. Thanks! I'm also going back and trying older BINs in case one of my adjustments caused it. I only get the erratic reading when stepping on the gas and triggering AE. Like clockwork...