05 Dodge Magnum new long block

Question edited for clarity.
Question moved to sub category.

It appears to be a known issue.

https://www.google.com/search?q=2005+Dodge+Magnum+5.7+Hemi.+No+crank+no+start

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Your diagrams are at the link below
Repair Guides Fuel ignition System 2006 Fuel ignition System 2006 AutoZone...

the hemi engine is 2 years or 30,000 miles. the 2.7 and 3.5 are 5 years 100,000 miles

Bad thermostat, clogged radiator, wrong timing, bad fan or clutch..ECT...

I am going to guess on this one ... your tank cannot breathe because it is over filling, blocking the breather that feeds back into the tank from the charcoal canister. There could be other reason for it not being able to breathe ... Prove this by loosening the cap on the fuel tank. If it runs with the fuel tank cap loose, you have your problem identified ... now to find the cause.

I hope this helps you ...

Thaks for your interest in FixYa.com. Plese come again.

Here is the firing order diagram for that engine.

have you tried reversing the headlight job,and see if it will start,it sounds like a wire was disconnected or cut,or was spliced into by mistake

Rings & bearings & oil pump need urgent attention!
Cheers Rob

have seen egr valve cause performance problems without setting any codes..and if egr is not working properly,can cause a spark knock..oxygen sensors as well..also make sure no injector or coil connectors are miswired to other cylinders

there is a break in period, but there is no reason for you engine to be sluggish, if that would be the reason all new cars would run sluggish. if you have arcing that mean that your not running on all cylinders your dealer should heck your car