Could be a vacuum leak. What's your idle like? Are the revs hanging and/or then dropping down to where it shakes and cuts out?
I was at Steeda on Saturday trying to get chipped but ran into trouble with some vacuum leaks with my JRSC. Anyways after that we went to the dyno to see a 500 plus HP Mustang get tuned after some boost upgrades. It came in sputtering and smoking like a SOB. Well the meister tamed the beast with earth shattering run at 533 hp!! :o
This took about a dozen pulls on the dyno with a few problems that needed fixing or adjusting. One of the problems was a whistling noise that sounding similar to your procharger sound. One of the guys put there hand over the TB and the whistling stopped. They found a leak at the gasket. The car owner made a gasket out of cardboard and sealed it with some sealant. It appeared to work as there was no more whistling noise and he gained some more HP on his next dyno run.
I was at Steeda on Saturday trying to get chipped but ran into trouble with some vacuum leaks with my JRSC. Anyways after that we went to the dyno to see a 500 plus HP Mustang get tuned after some boost upgrades. It came in sputtering and smoking like a SOB. Well the meister tamed the beast with earth shattering run at 533 hp!! :o
This took about a dozen pulls on the dyno with a few problems that needed fixing or adjusting. One of the problems was a whistling noise that sounding similar to your procharger sound. One of the guys put there hand over the TB and the whistling stopped. They found a leak at the gasket. The car owner made a gasket out of cardboard and sealed it with some sealant. It appeared to work as there was no more whistling noise and he gained some more HP on his next dyno run.
vintage 2000 malibu blue ZX3 ***SOLD***
2013 performance blue ST
TEAM P.I.T.A.
2013 performance blue ST
TEAM P.I.T.A.