Help my 307sw 2.0 110 HDI started to hesitate & also then backfire on change down (4 to 3 or 3 to 2) & after disconnecting/reconnecting the wires to both the bottom Vacuum Solenoids the problem dissapeared. Now after 2 months the hesitsting is back again. I have replaced both bottm Vacuum Solenoids & not cured it. anyone know of a decent Pug mechanic/garage in/around Longbridge B,ham who can sort this without getting ripped off please. I,m due to take the family on holiday in a few weeks so pretty urgent ....by the way this car is driven on motorway all week so Pat not issue, & no fault codes present.