check the crank shaft actuator?
Car emissions can be reduced by reducing idling time and by driving at a moderate highway speed when possible. Driving too fast and idling are both wasteful in terms of fuel, and increase the vehicle's emissions.
The idling speed is automatically sensed ....and set by the Air control valve
It is zero: when it is idling.
It is possible it is one of the speed sensors.
while driving yur car reduces speed then pulls off with speed and backfires what can cause that
800 RPM
5 speed or automatic?
Try adjusting the idling speed - sounds like idling speed is too low so when you take your foot off the gas it can't idle (Tick over)
A bad coolant temperature sensor is one thing that could cause an idling speed problem with a Peugeot 406. There could also be a problem with the idle control valve.
Idling is what your car is doing when it is just sitting somewhere running. As soon as you press on the gas it is no longer idling. Your idle speed is the number of RPMs your engine runs at when you are idling.
approximately 14.7:1
10 Years of driving! My 1999 went last year.