So I just dropped a 454 LSX engine in a 03 Silverado that came with a 4.8 and added a Procharger to boot. Should be a blast once it's up and running. Truck is being tuned in SD and my tweaks haven't had any success yet.
I don't know the cam specs but I'm assuming they are pretty big with it being a 454 and all. I started around 15 g/s idle airflow and have been steadily climbing all the way to mid 20s and it still doesn't want to idle right. No codes except for a battery charging issue and some misfires (from the cam most likely).
Also, it won't start without giving it throttle. I've been steadily adding to the friction airflow initial. From like 4 to 18 now and it still doesn't seem to start right.
Keep in mind I just climbed on these numbers 10-15% at a time. Did I overshoot it? Is there another field I should be trying?
More timing? I'm kind of lost here because these numbers seem like they're getting out of control yet it's still not running. On the other hand we're going from a 4.8 to a 7.4
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