Rough idling, rough running, loss of power, poor fuel economy
Truck idles rough after start and continues to do so while driving. Bad vibration. Loss of power, hard to maintain highway speed. Very poor gas mileage.
My attempted fixes have been.
- New fuel filter
- New spark plugs
- New plug wires
- New timing belt
- New serpentine belt
- Tried Sea Foam system cleaner
- Tried Chevron fuel system cleaner
Is this a good question?