1993 k2500 6.5 well last night i started up the moter after it sat since september. I put on new heads from ss diesel oil pump ops and all the gasket the ops and oil pump are from ssdiesel. I also put on marien injectors from penzacola diesel. IT fired up with little diffecaltylast night and ran fine but it blow a break line so it had to what till tonight for the test drive. IT idled for fifteen minutes no problem. I took it down the hill on my rod and when it leveled back out it died. It started back up and went a little ferther and on a up hill grade it died. i pulled it home and it fired up. Drove it about two miled and on an uphill slop it died again. let it sit for a little and limped it almost home going up the hill to my house it started to stutter and die. It started to only stall under a load but now it will not run for more then thirty second. I only have power to my lift pump when runing or cranking and my oil pressure gauge is low but is adquate. any help is appreciate

oh yea one injector is leaking a little from the middle and when i give it throttle in park it blows black then white some that does not smell like antifreeze but hard to tell