340 CAT ETX intermittent surging with 3000 RPM limit or it'll die and not start

[trayson]

How is it running when it limits itself to 3000? Idle normal even though it surges Just won’t rev past 3k?
Sounds like the ECU is going into a limp mode.
I would replace the ignition coil, when they die it’s usually slow and causes problems.

Definite and noticeable loss of power. When I give it throttle from neutral to WOT, it surges, goes a tiny bit above 3k and then settles to 3k on the nose.