Finally got the 7 to run, I left it outside & it froze, then it wouldn't start, so I did the unflood thing a bunch of times and it finally worked. Smoked really bad for like ten minutes, and then my mufflers exploded, any temporary advice? Car won't stay running if I let off of the gas.

 

Check for vacuum leaks

 

Anything else I should look out for? I was spitting out these giant fireballs too, kinda cool looking, but at the same time it sucked. Turbo mufflers will fit an N/A, right?