Why does my 2006 300 Touring rev up then down at steady speed?
When driving at a steady speed, I notice the car revs up a bit then down. I can accelerate no problem but when it goes along at a steady speed, some times it will porpoise up and down. Why does it do this and how can it be fixed?
Also check fuel injectors, you might want to get a strong fuel system cleaner. Chrysler dealerships use BG products. BG 44K Fuel system cleaner and power enhancer this works really good. It also increases octane levels in the gas. I have used it a few times and have noticed better throttle response and bit more power, also increases fuel economy.
1 people found this helpful.
