eddie95
Active Member
- Joined
- August 8, 2011
- Messages
- 93
- Reaction score
- 2
- Year, Model & Trim Level
- 2003 Explorer 4.8 AWD
I have been battling a slight misfire for a while. It generally consisted of a jerking motion whenever you try to accelerate hard and the actual misfire starts at almost exactly 2000 rpm. This misfire only happens under acceleration, so if you are just cruising, it is really smooth. The misfire is also not very consistent, as it will jerk every second or two instead of a constant shaking.
There is no check engine light, and I had ignored the misfire for a long time since it use to be occasional and I hardly ever drive on the freeway. Well today I drove on the freeway and I noticed the misfire more than usual and my gas mileage has taken a dump lately as well (used to get 22 mpg highway, now only 17). I can also smell a slight gasoline odor when the engine is cold and idling (however there is no noticeable misfire at idle).
I replaced the plugs and wires about 10 thousand miles ago with Autolite wires and NGK plugs, so I know that they are OK. The fuel filter was also replaced at that same time. Does anybody have any idea where I should start looking here? I had been running injector cleaner through at almost every fill up, but I haven't been doing that lately (and come to think of it, when I stopped was when I started having the problem). Should I just run some more injector cleaner through and hope that it clears out whatever is going on, or does it sound like an electrical problem?
I appreciate your help!
There is no check engine light, and I had ignored the misfire for a long time since it use to be occasional and I hardly ever drive on the freeway. Well today I drove on the freeway and I noticed the misfire more than usual and my gas mileage has taken a dump lately as well (used to get 22 mpg highway, now only 17). I can also smell a slight gasoline odor when the engine is cold and idling (however there is no noticeable misfire at idle).
I replaced the plugs and wires about 10 thousand miles ago with Autolite wires and NGK plugs, so I know that they are OK. The fuel filter was also replaced at that same time. Does anybody have any idea where I should start looking here? I had been running injector cleaner through at almost every fill up, but I haven't been doing that lately (and come to think of it, when I stopped was when I started having the problem). Should I just run some more injector cleaner through and hope that it clears out whatever is going on, or does it sound like an electrical problem?
I appreciate your help!