Clio 2 egr fault (recurring) 2004 1.5dci

[jamrussell]

Sorry if this has been covered but i couldnt find anything. I have replaced the EGR valve and cleaned all the muck out of the pipework associated with it. However the same symptoms keep occuring, loss of power below 3500rpm, poor fuel economy etc. The glow plugs have also been replaced in the last week.

Any ideas as to what may be the cause of this as it is getting a little frustrating.

Many thanks
James

	EGR Exhaust Gas Recirculation EGR is a NOx (nitrogen oxide and nitrogen dioxide) reduction technique used in most gasoline and diesel engines. EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. Intermixing the incoming air with recirculated exhaust gas dilutes the mix with inert gas, lowering the adiabatic flame temperature and (in diesel engines) reducing the amount of excess oxygen. The exhaust gas also increases the specific heat capacity of the mix lowering the peak combustion temperature. Because NOx formation progresses much faster at high temperatures, EGR serves to limit the generation of NOx. NOx is primarily formed when a mix of nitrogen and oxygen is subjected to high temperatures.

[madnoel10]

Have you any warning lights on the dash plus any signs of either black smoke when accelerating or white smoke whilst starting.

[jamrussell]

No, thats whats confusing me, there are no warning lights up and no smoke that i have noticed. Its just all or nothing with the car and its getting very annoying.

It seems to clear itself up overnight and can drive fine for anything upto 150 which is my drive into work, then to come home twelve hours later it has nothing untill around 3500 rpm then its like somone has let slip the dogs of war. It will not cruise at anything over 60mph.

I hope this helps.

James

[madnoel10]

One posibilty could be a faulty turbo sensor although this usually affects acceleration dramatically.

	Turbo Turbo A turbocharger is an exhaust gas-driven compressor used to increase the power output of an internal-combustion engine by compressing air that is entering the engine thus increasing the amount of available oxygen. A key advantage of turbochargers is that they offer a considerable increase in engine power with only a slight increase in weight.

[jamrussell]

Originally Posted by madnoel10

One posibilty could be a faulty turbo sensor although this usually affects acceleration dramatically.

as in a wastegate going wrong or something else?

	Turbo Turbo A turbocharger is an exhaust gas-driven compressor used to increase the power output of an internal-combustion engine by compressing air that is entering the engine thus increasing the amount of available oxygen. A key advantage of turbochargers is that they offer a considerable increase in engine power with only a slight increase in weight.