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To be honest, not giving your turbo diesel a good hard thrashing every now and again. I know it sounds silly but the high temps created will help free up the carbon deposits with the egr system and intake manifold, which cause the sticking egr valve.

I have worked on many Ford tdci's vauxhall cdti's and done servicing on police cars. Never seen a police car with a blocked up egr and clogged intake manifold, but have seen the same car with less than 10K from new with it completely blocked - was a 50+ lady who admitted never going above 2500 rpm.

Only reason for the police car not having the problem (with 100K+ on the engine) is the engines are on full throttle for sustained periods of time and it burns off the the soot and carbon.

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15y ago

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