Idle Air Control Valve - Stepper Motor 1.6VVT 2004

[lotussam]

Hi, could anyone advise if there is an Idle air control valve or stepper motor on a 1.6 VVT Scenic engine 2004? When I start the car from cold I have to give it some throttle so it keeps running. With steady pressure on the throttle the revs rise and fall all by themsleves. After a while (1-2 mins) it all settles down. Starting from hot it is fine. Friend mentioned the above valve but can't find any details on the 2004 1.6 VVT. Any help or ideas on how to fix greatly received. Thanks

	VVT VVT Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two stroke engines use a Power valve system to get similar results to VVT.

[Haree]

Hello,

I don't know if there is a stepper motor on the 1.6 16v VVT K4M engine but I would imagine there would be an idle control valve. You mention you have to give it some revs to start it from cold. Do you get a rattle like noise on start up.

Harry.

	VVT VVT Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two stroke engines use a Power valve system to get similar results to VVT.

[madnoel10]

It could possibly be a faulty engine coolant sensor whereby the ECU thinks the engine is always hot and not add additional fuel or extra rpm when cold.

	ECU Electronic Control Unit In automotive electronics, an electronic control unit (ECU) is an embedded system that controls one or more of the electrical subsystems in a vehicle. Some modern cars have up to 70 ECUs.

[lotussam]

Thanks for your suggestions. It doesn't make a rattling noise when it starts. I will look at the engine coolant sesnor. Thanks for your ideas.