I did a full tune up on the car a couple weeks ago and took it to the track and ran 12.5 and the car was running great. besides fine tuning it was doing awesome. after i got back from the track it ran fine for about 3 days then started missing. checked wires=good, replaced my plugs cuz a few of them didnt look so great, went ahead and changed fuel filter(been about year and half since that) sprayed some injection cleaner through the throttle body, played with tuning(no help). fuel pressure is in the right range, cant really think of anything specific why the car wont run right. it will start up, but soon after will start to surge and then die abruptly. when i did my tune up on it, i double checked for vaccum leaks and sealed anything else i could.

Im running the stealth ram setup with holley 950 ecm. msd dist, msd coil, crane hi6 box, taylor 8mm wires, autolite ar133 plugs, 30lb svos, walbro 255 pump.

any ideas what could be the problem causing it to surge and die like this?

 

update: god praise sea foam. haha, after running it through it and taking the car out for a short spin. It seems to be running better. the sea foam did however reveal all my exhaust leaks. lol.

 

So an exhaust leak is what the problem was? What's with the sea foam?