I have a 04 reg 1.4 hdi c3 which has a lack of power / acceleration. I have checked a/ changed various things like egr velve, egr control valve. There are no lights on the dashboard and no error codes on diagnostic.
Could anybody suggest any other things to try or has anybody else had this problem and been able to resolve it

Chris, December 2014

yes, all that has been checked and everything seems fine, read an old post earlier sugesting that it could be a problem with the injectors

Chris, December 2014

Have you checked for play/wear in the turbo impeller or splits/cracks in the intercooler and hoses/pipes?

cdc, December 2014