u/Unlucky-Pangolin9760

So I have a 89 grand marquis ls, it has a cold air intake along with it being straight piped. When I start it, the engine starts right up but as seen in the video it dies shortly after. When turned to the on position I can hear the fuel pump engage, so i know that isn’t the problem. I believe it is the “Idle air control”(IAC)” but I am unsure. It does have a tendency to stall out when stopped as well. I really want to get this thing fixed so I can enjoy it this summer!