Increased Idle Speed and Rough Running During Cold Start | PEUGEOT 207/207+

A fault memory query should be performed here. The engine running problem can have various causes, such as: false air intake; incorrect temperature values from the sensors; etc. If an error log is available, please post it here again.

Hello, thanks for your reply. Unfortunately, there is no entry in the fault memory.

Check the engine for vacuum leaks. The crankcase ventilation valve often fails. You should be able to detect this when you have an emissions test done. Then the engine will run far too lean.

Thank you for the tip

Have an emissions test done to see from the exhaust values whether the engine is running too rich or too lean. You should also have the basic engine settings, timing and compression checked. Incorrect timing or leaky valves/worn piston rings also affect the engine running.

Okay, but what I'm wondering is, the engine only runs for about half a minute to a minute in the cold start, with a slightly high RPM, and only jerks slightly at the beginning. After it's warm, it runs very, very smoothly, and this problem doesn't occur the next morning after a long highway drive, for example.

P.S.: Could it possibly be related to the fact that I switched to V Power fuel, and that's why it's happening, because this problem came after the 3rd V Power tank filling.

Thanks in advance.

Hello, try leaving out the V Power fuel for a few days, then you might have a result. Many vehicles are not designed for 100 octane fuel. Usually, there is a sensor that measures it and adjusts the air and injection accordingly. Please google whether your vehicle is designed for it.

Have you checked for any leaks? Maybe spray with leak detection spray / brake cleaner. Also check if the temperature sensors are OK.

Is it a short-distance vehicle? If so, have the intake ducts + valves checked for coking. The EP engine tends to coke the valves.

Are there any errors stored? Is the engine control light on?

Hi, have the valve cover checked. EP engines have a flutter valve in the valve cover, and this is very often a fault that is not considered because only a few people know about it. Regards, Christian

Thank you for the information

What's the status? Regards, Christian

Hello, Thank you for the tip. The car has recently started emitting blue smoke and the oil consumption has increased significantly. There is also a hissing sound in the area of the diaphragm, which disappears when you open the oil filler cap while the engine is running. I suspect the diaphragm is leaking. Have you ever replaced one of these? Because actually it is part of the valve cover. I only ordered the diaphragm with the cover online, I didn't want to replace the entire valve cover. Kind regards