[unclebubbles]

It could be the iac, but normally you would be able to rev it and keep it going. Do you have two tanks, can you switch to the other tank if you do and see if it does the same? Either rig up a gauge, or take it somewhere and have the fuel pressure checked. You cant rely on just checking to see if its pumping fuel at the valve on the fuel rail. A drop in pressure of as little as 5# from a pump getting weak can cause problems.