I have a 2000 v6 running 5 psi procharger s/c, my car has been running rough lately it idles fine my boost gauge hasnt changed readings at any time including when in vacuum. i just seem to have less power. i changed my spark plugs and my wires are good. i have been smelling my exhaust system lately like sulfur smeel of cats.i do still have stock exhaust,and sometimes it takes a little while for my engine to rev down to idle it will stay around 2000 3000 rpm for a few seconds when i stop i have a manual trans. so today i ran a compression check and cyl 1,2,3,4 have around 200psi i think thats kinda high possibly due to carbon buildup from cats starting to get clogged, cyl 5 has 175 and cyl 6 has 125 psi which i think is kinda low. not sure where to go from here. i usually run a 14.2 at the track and this weekend ran a 15.1 getting full boost but my power seemed to drop off in third and 4th gear when going down the track. any ideas would be helpful, im thinking cats and fuel pump i have the fuel pump and wondering i might be getting weak fuel pressure.
that'll clean the engine out greatly
