i just put head gaskets on an 03 6.0. torqued everything to spec that listed a spec. can not get it to start. can only crank on it for about 30seconds to a minute and the batterys are dead, let them charge, then try again. still no start, ive done this all day. are they that hard to get air out of the hpop? or do i have a problem some where else?

 

Have you checked to verify it's getting fuel. Just pop the filter out of the bowl on top of the motor and turn the key to see if fuel is squirting in there. I'd check that first. Sometimes they do take a while to bleed the air out fully, but they'll usually start and run rough if that was the case.

 

it ended up being the cam sensor was unplugged fired right up