I need a little help. Some times my truck starts right up and other times it may take four to five cranks to start. Cranking is not the problem. Could it be injectors. We recently replaced the injector and lift pumps and fuel filter. It sounds like it is not getting fuel, kind of like the fuel is siphoned back to the fuel tank. Is there a fuel pump in the tank or outside the tank between the tank and the lift pump. I am also getting poor fuel mileage. The truck has 190,000 miles and as far as I am aware is in good condition. Could it possibly need an upgraded power chip. I am stumped and any advice would be appreciated.
~Tom.
~Tom.