Hold on now... This wouldn't be the throttle shield plate now would it? I would definately put the bolt (or get one) back into the hole to seal the W-pipe. Because yes, that can cause a vacuum leak. --- In dmcnews@xxxx, "Walter Coe" <Whalt@xxxx> wrote: > > you know that > > plate that sits on the W-pipe on the intake manifold? > > > would this plate being loose or missing a bolt cause a vacuum leak? > <snip> > > My theory on this plate's purpose is to cover the access needed to drill > pressure equalizing holes between the chambers. Or is this plate replaced > with some kind of sensor in non-DeLorean applications? >