It ran ok but recently when it is either warm outside or the car is warmed up it will start to buck and stutter and the gas guage will go up & down and will smell like gas bad and sometimes will shut off and wont start for a while but i put a new fuel filter yesterday and it ran the same so i checked the pressure in the lines and now it will start and shut rite off. Can anyone help? Thanks

what you need to do is check your coolanet sensor of the sensor on top of the intake manifold

you should check you sensors

Explain your issue a little better.

I agree with Shelby500. Check the coolant sensor in the top if the intake.