Ok, so here's the deal. My 91 RS v6 is being a pain. I bought the car about a week ago, everything ran fine. It started stumbling one day, and as soon as I shut it off, it refused to start back up. The next morning I go out, it starts up find, runs for about 10min, then shuts off and won't restart. Same thing the next morning. So, I go about replacing things. First was the fuel pump. Did that, started right up, ran for a bit, even went down the road, but with any sort of throttle it would die. Started back up everytime it died, but would keep shutting off. As soon as I let it sit for about 5min without restarting it, it refused to start back up. Now is when I went a little crazy replacing things. I replaced the fuel filter, fuel pump relay, spark plugs, cap and rotor, and ignition coil. This thing still won't start. I know the fuel pump is pressurizing because I can disconnect the line under the hood and it shoots out gas. I know its sparking because I did the old put one of the wires near a ground and turn it over trick. So, as of right now, I'm completely lost on what it could be. Help.

 

try a new ign module,my old v6 would cut off after warmed up because it would module would heat up and short out,they will test good until around 170-200 degrees,im pretty sure thats your problem.it is under distributor cap on base of distributor held in with 2 screws