Recently had diagnostic at dealership, gave me a paper that shows fuel pressure rates, can someone interpret it for me, issue the truck was taken in for was a P0087 code only under load, heat and hill, truck has 280,000 miles, works great when not under load! Dealership said I need new injector pump and injectors, is it true? Have changed fuel filter religiously and used seafoam once a month, don't drive too much anymore on long trips