Could be the DPF is clogged up may need to regenerate, stop start driving clogs em up. ECU will instruct the engine to chuck more fuel in when you are at high speed to raise the DPF temperature up to blow out soot that has accumulated. Beware though they only regenerate so many times. It will clog up again, loss of power and increase in fuel are the tell tale signs. Best bet is to get rid of the DPF, have it re-mapped and then you will have more performance and not have the £900 expense of a replacement DPF every 4-5 years. And "NO" it doesn't affect the MOT emissions.
Longlife Exhaust Systems
Improve your Diesel Car Performance
Modern Diesel engine cars are fitted with Diesel Particle Filters (D.P.F.).
With the constant “Stop/Start” of normal urban driving D.P.F’s will clog up with soot. The engine management will regenerate the DPF by injecting a larger amount of fuel to raise the temperature to burn off the soot. Regeneration cannot clear all the soot from the DPF so eventually the car will lose power, increase fuel consumption resulting with the Engine Management System placing the car in “Limp Mode”.
2 Options
Remove and replace the D.P.F.
Example: Citroen Xara Picasso 1.6 HDI D.P.F. £425.26 inc vat
Fluid £104 inc vat
Plus removal and fitting !!!!!
2) Alternative: Remove D.P.F. and fabricate a replacement Stainless Steel Pipe, read and re-map ECU to standard program or re-map to a performance enhanced program.
Gains
No future expense of D.P.F.
Increased performance and economy
No effect on emissions
Example: Citroen Picasso 1.6 HDI 90 BHP increases to 112 BHP
Torque 215 Nm increases to 247 Nm
Torque increases will result in higher miles per gallon
Call Dean 0121 643 3320
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