Want this question answered?
By itself, the thermostat would have to be stuck closed causing a severe overheat condition to cause a loss of power.
A malfunctioning oxygen sensor can cause the engine to be low on power.
If engine power then check the anaroid valve on the injection pump.
A blocked fuel filter could cause the engine to lose power on a 92 Honda Civic DX. Fuel injectors that need changing or cleaning could also be the cause.
Check the ignition coils. When they go bad the engine runs rough and you lose power.
Fuel pump could be possibly getting weak. Happened to my blazer.
change the fuel filter
if you have a carborator, it may have to be adjusted
Bad alternator
what would cause a 150cc scooter to lose power?
Yes. Go to auto zone and have the codes read for free. And change the fuel filter.
Have you checked to see if you are leaking any oil while you're traveling uphill? Loss of engine oil will cause your car to lose power, and eventually blow your engine if you don't replenish it. How much power are you losing? Every car will slow down when you're going up a hill and will require you to push harder on the gas to maintain the same speed. A bad knock sensor will cause very weak acceleration. This happened on two of my subarus. It is an easy fix and improves the situation immediately.