my 97 has deffo got a prob ur driving along and sometimes when u accelarate it is surging,the boost guage goes from +14 up to +18,then it recovers and all is normal again.Sometimes this prob occurs at 40mph,tho not with the same boost figures.

i have been told that there is a sensor? or something located behind the front bumper,that could be faulty,so cab anyone help???

Thanxs
andi