A little new to ths diesel world and after finally getting my truck back after a tranny rebuild and replacing the wishbone fuel line its gotten pretty cold and ive learned either my glow plugs or my gpr need replaced, but even after the block heater has been plugged in it seems to struggle starting, white smoke, and long crank times, however with a quick mist of starting fluid it fires right up, not really sure what to check first but my clue to a weak fuel pump is absolutely no black smoke ever, under a load, or on 140 with the ts, which every other ts tuned psd ive seen/driven has smoked ridiculously turned up, no smoke doesnt hurt my feelings, just hard starts! Thanks in advance