Hi thanks for the reply what I need to know as its the map sensor shouldn't it be airtight as mine is fitted rather loosely I think one of the o rings are knackered
So it shouldn't have any movement either side to side or up or down mine is really loose going to see if I can find some new o ring's to seal it better as I think mine are worn
It should ideally be airtight yes. I didn't realise you wouldn't be able to read that thread I linked - that's got details of a fix. But yes, a better seal will help. A lot of the 197s suffer from a flat spot c2.5k revs - possibly caused by the sensor being loose.