Engine Mis-firing When Idling

[citroen ray]

my citroen c5 exclusive 2000cc petrol is mis-firing when idle in every gear and even with the cruise control on,does'nt matter if the engine is cold or hot,only goes away when you accelerating the engine,can anyone help please it's driving me mad, cheers Ray

[kfk]

Is it the HPI model?

[citroen ray]

Hi yes it is the hpi model

[kfk]

Hi yes it is the hpi model

Dont know when you last had a spark plug replacement, but due to the lean burn engine they do tend to eat them.....its recommended they are replaced at every service.

 

Other than that, the hpi engine isnt the smoothest, again mainly due to its lean burn characteristics.....is it a problem that has developed or a problem that has always existed?

[citroen ray]

Hi it is a possible which developed about 9 months ago,it has had new plugs and a new coil pack but it is still the same,it been on the citroen computer and it comes up with no fault.

[kfk]

I've got to be honest.......we have had one at our dealership, had plugs, coils and injectors.....it didnt change anything.

 

Our feeling was that the injection ecu software was causing it, which unfortunately we are unable to do anything with.

 

My gut feeling is that it's something you might have to live with until it worsens

[citroeneddie]

Did they stop making the petrol HPi engine because it was unreliable?

[kfk]

Did they stop making the petrol HPi engine because it was unreliable?

reliability wasnt really an issue.....although some suffered from rattles from the variable timing pulley.......they sounded like diesels