Because you a fat piece of load that needs to lose some weight
Need a bit more info. What motor and year? Are there any other symptoms?
If you have an automatic tranny, and the fluid is low, it may not gear down on the hills and may possibly stall. Check this out first.
No the can go faster downhill or uphill
is there going to be a scooter game
downshift
Does your car have overdrive? Does it stall when going uphill? If you answered yes to these it is possible that your transmission kick down isn't working.The kickdown basically detects when the car becomes under load and shifts the transmission down a gear.
In hiking, the general rule is that hikers going uphill have the right of way over those going downhill. This is because it is usually harder for uphill hikers to stop and start again compared to downhill hikers.
gravity!
Gravity.
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Engine is in need of tuning.
noo