1999 Nissan Pathfinder. 16 mpg-poor for 6 cylinder Nissan. Struts and shocks needed replaced and muffler pipes corroded at 70,000. Intake manifold gasket leaked at 72,000. 2-wheel drive not good on ice/snow in town, but go slow and smooth on icy mountain highways and is OK. 4WD is OK. one way to check that is to prime the system. turn the key to on and let it sit for a sec or 2 then turn it off and try to start as normal. if it starts faster than normal its either a pressure problem or fuel is leaking back into the tank and the pump is having to provide fuel first. the system should still have some pressure and fuel on the lines even after the truck is turned off.