I have an 89 IROC 350 that recently threw a fuel pressure regulator. When it went it was running fuel through vacuum lines and all inside the intake. When I poulled the snorkel off there was fuel pooled inside the rubber and throttlebody. After I fixed it the car ran great, but now I have an issue with idling when I first start it and sometimes when I come to stop while still in gear. I cleaned the throttlebody real good with some carb cleaner, but doesn't really seem to fix anything. Anyone have any ideas?

Todd