[jvmcnair]

I need to repair the PSE vacuum valve (dashpot?) or it's hose on the left side of my 2000 996. Just a note; this model has no switch but it is somehow modulated by the DME so has a vac switch that directs vacuum to the two dashpots on the muffler bypass's which, on this model, entirely bypass some exhaust via a 1" pipe from input side to the exhaust tip. I've used a vac pump with gauge to test and find I can operate the right side -and I can hear it- and vac is held. On the left no vac will build so there must be a leak in the dashpot or the last 8" of hose I can't reach or even see from under the car. OK, sorry for all that detail but my Q for now is: How do I drop the left muffler? It appears easy but is it? Would it be better to remove the rear valence? Exactly how is that done? ie where are the screws, clips, etc? thanks, jvm