hi need help .just bought an 03 plate 307 2ltr hdi 90bhp . the air doser vacume pipe is missing . dealer says its just a breather and wont affect the car . but the throttle keeps running on after i remove my foot from pedal . until i press pedal again or take it out of gear . the partical filter warning light was on after i bought it so i took it to peugot who plugged it in and reset the computer . it hasnt come back on since . . taking it back to the dealer on monday . so any help would be grateful .