Hey guys. My 07 5.9 has 80k miles. All city driving, limited towing. After a long drive my truck is VERY hard to start back up. It's still under factory warranty & the dealer replaced all 6 injectors 10k miles ago. The problem happened again and now the dealer replaced the FPR and all 6 injectors again.

Obviously this cannot be common, I only use gas station premium diesel.

Any ideas????