I have a ls2 Gto
With a 236/240 camshaft 110 lsa 629 int 612 ext
Fast 102/102
Ls3 injectors
Sd tune with stft enabled
Catless headers 3 inch exhaust
Etp 215

I've had an issue where intermittently it'll have an extended crank /no start
It'll pop through the exhaust sometimes loud sometimes quiet
I had it actually chug onetime almost like it was on a few cylinders

This issue has plagued me ever since the cam install
Even with stock 243 heads
The fuel pump isn't stock and even after a swap I had the issue
It does have a slp dual time chain with can sprocket.

I almost wonder if it's related to the cam sensor not seeing Anything.

I've played with all start up tables

Anyone have a recommendation of what I can log to possibly find the underlying issue?

Has anyone seen this problem?

Other then that issue the car drives great
Driveability is pretty damn good for that size cam
It pulls great
Laid down 503-451 on a
Midrange dyno a year ago

I think i need to look more closely at either the ckp or cmp sensor closely.