Well i just put in a motor in my '04 600 and i cant get it to fire. i did install some milled heads on it, and double checked the cam install. i have fuel going into throttle bodies (i can see it squirt and smell it). i pulled all the plugs and checked each for spark. all kosher. i do have a power commander hooked up but i tried starting with and without and still no luck. is there any way to see if the plugs are firing when they are supposed to. i installed motor and everything by the manual so i know i didnt install cams incorrectly.

any help or advice would be appreciated.