I am currently trying to restore my dads 1994 mustang GT that has been sitting since 2009. Currently has cold air, EGR delete, cat back exhaust, new TPS, new fuel pressure regulator, and new IAC. Started by dropping the fuel tank and dumping the old fuel, filling her up with some fresh fuel, new oil, and some spark plugs and wires. Started up but it was 'idling' at 2k RPM but it was running and would stay running. Decided to replace the IAC when the car was no longer getting pip signal from the distributor or spark. I replaced the distributor and coil, timed it to 10* BTC, and double checked firing order (all good). Now since then I am barely able to keep the car running. I am lost on where to start with what is going on now. The car starts, never exceeding 1k RPM and dies just as quick. Now every once in a while it will start for a couple of seconds rev on its own to 2k rpm but when it tries to go down to idle rpm it dies. When it does start like this and I push on the throttle it begins to die, when I let go it jumps back up to 2k, and when it tries to go back down to idle I mash the throttle to the floor it 'runs' but doesn't go above 500 rpm with throttle to the floor. One more thing is that when it is 'running' at below 500 rpm there is a pop or bang sound from the passenger side and when it pops it jumps rpm and pops again jumps rpm till its going back up to 2k rpm and is giving a strong smell of fuel from the passenger side. Giving it any sort of throttle wants to kill it but for whatever reason throttle to the floor keeps it running under 500rpm. I've checked vacuum lines those seem to be good and fuel pressure is 10 psi and stays when it starts to run at 2k and loses pressure after it dies. Just don't know where to go next possibly re-doing vacuum lines, PCV? I'm lost on this one. Thanks for the read.