Today i shut the truck off after a 75mph high run and went to restart it less than 5 min later and it wouldnt start like it wont firing. I noticed my oil pressure guage bouncing between 0 and half (sorry dont have exact #s factory guage) finally when it did start it sounded real weak like the injectors werent firing good. Then it cought it self and ran with a slight miss and after sitting for two hours it fired right up without hesitation the oil pressure guage took no time tocome up when cranking and ran good for 25min and I shut it down again for 30 min or so and started fine and ran good afterwards....the truck has a slight miss every now and then and i dont have access to a good scanner to read icp,irp percentages. Im thinking a dieing hpop, and or a leak somewhere. How can i pressurise the system and check for leaks. Or does anyone in the richmond area have a nice scanner we could hook it too?