Car Mechanics (UK)

Hunting at tickover

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Q

I have a 2008 Peugeot Boxer Autosleepe­r 2.2 D with 60,000 miles. The engine is hunting quite badly at tickover, to the extent that it has thrown-up the engine management light when it stalled. While I expect this to reset itself in the fullness of time, I have had a look round for perished hoses, etc, and the oil and air filters are both good.

Online forums are not a lot of help and they

are full of conspiracy theories and comments going off at a tangent! The last time I took the Boxer to my local garage, they had difficulty linking it to a diagnostic computer after they had fitted an EGR restrictor plate.

I downloaded an e-manual, but it was not specific to my model.

Dave Jones

A

The prime suspect is an air leak in the induction or control systems. Very often such leaks can be very minor and difficult to locate, so a thorough and methodical search along the hoses would be my first recommenda­tion.

You do not mention why the garage fitted the EGR restrictor plate and it’s possible the fault may be linked to this. As you have a 2008 vehicle, it should be fully compliant with any EOBD reader, so if communicat­ion is an issue then it may indicate an ECU problem. A code reader such as the Foxwell NT301 will cover the basic engine functions and read-off live data; this unit is available for £75 from this website: http://bit.ly/1tivg9m

You should use the reader when the engine management light is illuminate­d. Retrieving the fault code that activated the light will help immensely in diagnosing the cause of the hunting.

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