My 2004 Freelander TD4 has started to run very lumpy on tickover and is becoming difficult to start. The exhaust gases also smell very strongly of unburnt diesel. I had a similar problem before which I cured by nipping up the connectors on the fuel rail pressure sensor three pin connector but this time the same fix has failed to cure the problem. I'm sure I read somewhere that you can buy an aftermarket kit that replaces these dodgy connections but I can't find the details anywhere. Does anyone have any ideas? Cheers.