Reduced fuel economy? Jolting acceleration? This problem can be caused by various badly functioning car parts, but have you considered the throttle body of your 307 SW (3H)?
The throttle body manages the engine speed and by extension the fuel injection in the engine of your 307 SW (3H)! If this part functions badly, it can result in a rather significantly decreased fuel economy. The same goes if the injection is too low.
Mister-Auto offers you throttle bodies for your PEUGEOT $serie 307 SW (3H) at bargain prices but from quality brands including VDO, Febi Bilstein or Bosch.
Sale of THROTTLE BODY PEUGEOT 307 SW (3H) by engine