08 f350 6.4 diesel 160000 mls.drove appox 20 mls no probs.shut engine off returned 10 mins engine cranked but would not start.g.service wrentch on dash lit.replaced both fuel filters 9fuel in canister when filters pulled. primed still no start. checked all engine fluids.engine oil approx. 1 qt low oil looked as if had 5000 miles on change when in reality only 1000 since change;always dropped at 3000.add oil still bugger all.checked for codes,none.fuel press 390,voltage 13.8. notice graph for egr indicated 98% error.does this mean egr valve stuck/failed?also noticed batteries had gassed,meaning soot? residue on components in engine comp,too hot in compartment?batteries hold voltage and not low of acid,spins motor over.will egr problems not allow engine to start?how do you diagnose egr fault.lastly there were no addition or prolonged regen cycles.would appreciated any help failing that at least help drink the beer whilst we have a bbq cheers