Assuming this only happens when in park or neutral, the engine has a built in safety device called a rev-limiter.
Astra 1.7 cdti wont rev past 300 rpm
Rev. limiter?
Replace the mass air flow meter(s) (MAF).
Type your answer here... rev limiter
Rev. Paul Jones
The engine has a rev limiter while the transmission is in neutral. It will rev to higher rpm's when the transmission is in gear.
rev limiter
The rev limiter makes it so it wont over rev and the bike doesent blow up
wile in park or neutral newer cars wont rev past a certain point ,but when driving it will rev to almost redline. this is a motor safety feature the rev limiter. an aftermarket performance computer chip will at least raise the limit on the limiter,wich works by not allowing the coil pack to spark faster.witch is also the top end limiter
because fords suck.
~6900 rpm. Never rev it above 3500 in neutral
If the vehicle is in neutral or park and it doesn't rev over half throttle, it is the rev limiter (governor). That is normal.