Ok Im gonna try and explain this as best as possible. My Blazer had sat for about 4 or 5 months without running and I just got done with an ignition system replacement(wires,plugs,coil,etc...) I put some carb cleaner in the tank and let her run for about 10 minutes and i was gonna go for a ride to jet out the carbs HEHEHEHE!!! Well I barely got to about 15mph when it started missing and hesitating. And now it idles that way to I didnt drive it very far due to I was affraid I would be pushing soon and I think my valve guides are gone cause she's smoking right nice now. Could this just be something as simple as a fuel filter. ANY AND ALL ADVICE Appreciated!!!!