Hi. I recently installed the FASS system on my truck. I have no faith in the VP44. I am very pleased with the system. My only concern is that after the install the truck takes longer to turn over. It might not necessarily be anything bad, but I'm not going to just let it slip by and end up costing me money. With the stock pump it took about a half second to a second of crank time. Now, it fluctuates rediculously. Sometimes it will only take a second, others upwards of four to five seconds. It has me concerned that it may be sucking air, and in turn slowly ruining my injection pump. My brother who is a mechanic said that it may be the check valve but he is not sure. He also said it may be losing pressure while not running. Any help greatly appreciated, thanks in advance.