Hi all...for some time now my engine light is on...fitted new EGR and cleaned pipes and gaskets....still misses on acceleration from slow speed..ok say overtaking at higher speed. EML light still on...done 2K miles so cleaned EGR again...still light on..What tells the EGR to open..(sensor etc .and where is it)...while doing this work yesturday i found a lead coming over top of rocker cover on LHS ..with the plug on the end just tucked between exhaust heat cover.(not connected to anything..is this normal..or wher should it go..has a\small 2 terminal plug on end...also noticed pipe from servo pump to servo has a T piece with a small branch not going anywhere (sucks air when running)..again is this normal or is there a pipe missing ?...wondering if the hesitating problem is due to DPF ..not the EGR......Any help very appreiciated..TIA.