My car is running a little slower than normal I lost around 5 mph in the 1/8 an the 1/4 ,I think my belt is slipping causing doing a burnout I don't get that belt squeal anymore after I stop ,and the manifold gaskets haven't been changed in four years,I think that is a place to start oh boost gauge indicates 19 psi with a code three pulley so I know that's code use to indicate 17.5