Pickup stuters at all speeds and exaust smells like old gas

SOURCE: the check engine light came on and the van could

give it a tune up

SOURCE: Rough idle engine ticking

check for a lose spark plug lead or cracked elecrod insulation on spark plug

SOURCE: 2005 - engine sputters when engine speed decreas

you can try reseting the cpu first by disconnecting both positive and ground wire from battery for about a hour or so and if that does not work. I could be the throttle position which is located on lower right side of throttle body on top of engine removes with 2 screws and one wire harness very easy to replace.And if it is the sensor then u will have to disconnect battery in order to reset the sensor with the computer.

SOURCE: engine light is on,the engine shakes/sputters but

The gas smell is probably unburned fuel left in the cylinders.

Sounds like the car is running rich or too much fuel,a fuel injetor service may be in order, or a carb service.

OIl around the plugs could be from a leakon the valve cover gaskets or a clogged vacum line.

Time for a fuel system service.

SOURCE: SMELLS GAS BURNS GAS

P0440-This Relates to System for Evaporative Emission.You will need to check the purge cannister that is in the engine bay and connects as a vent to fuel system and fuel tank.Loosen the fuel cap and roadtest,should change the faults or eliminate.Get back to me with your findings and we can work towards a solution.I hope that this helps.