steps
maybe because your transmission needs fluid.....if it revs up and doesnt move, your car is not shifting gears....either you need fluid, or a gear is stuck.....check your engine for fluid and see if it's low. if not, take it in and get the transmission looked at.
tune up chevy trailblazer
Turn the throttle, revs go up. Let to, revs go down.
age,temperature,time
It's a road.
If the engine idles and revs up okay in neutral, it is likely the torque converter clutch lock up solenoid.
Because that's how an engine runs. it can only ever rev up if you give it gas. no gas, no revs. more gas, more revs
my 1998 Polaris Trailblazer has about 26hp and i have got it up to about 60mph
coal
my 307cc if started in gear pulls away no revs required even up hill
Transmission trashed.