I have a 93 Grand Cherokee. When I drive it, it will be running fine then all of the sudden it will spit and sputter for a brief second, then it will take off again. When I come to a stop it will want to rev to a higher RPM and then back down to normal, this happens whenever, whether the engine is hot or cold. The fuel pump went out on it last winter and it has a new one in it, also has a new fuel filter in it. Tried to see if it would do it more when the fuel tank it empty, and when it is full. Does not make a difference. Can anyone tell me what would be causing this.

Thank you,
kwdaye

 

Sounds dumb but if your buying from some no name gas station try shell or wawa. *idk if you have wawa's where you live i forgot to check location* I was running some cheepo gas from a gas station up the street and i was spitting and sputtering rough idle occasionally even a higher idle so i went and got some wawa gas. Never did it again. Shell gas actually improved my gas mileage it seems by 1. 20mpg if im feeling calm on the skinny pedal.

 

Tired the different gas thing, also tried fuel injector cleaner. still getting the same thing.

 

Have you checked for vaccume leaks?

 

Yes, no leaks. Any other suggestions from anyone, please