The title pretty much explains it.

The problem is, whenever im sitting at an idle, i can be in neutral put my clutch in and nothing changes. However, the second i let it out there is a drastic change in RPM's and most of the time stalls out.

I have been told that it is some sort of fuel issue... I dont really understand why that would be...

The only changes that have been made to my 1993 Ford mustang GT is a complete exhaust, intake, and an underdrive pulley.

I tried searching the forums for other possible threads that would explain this, but found nothing. Please, if anyone knows anything about this "issue" respond to this thread.

Thanks for your help.