WTF is wrong

[da kang3]

my f***!^ car just continues to make me happy one moment and pissed off the next. and let me tell u, u dont want me to get pissed off. but anyway, yesterday my car was runnin fine and then it started goin back to its old ways again. cutting off when im trying to stop, not starting back up until a whole minute causing traffic at a light later, and then yesterday, shooting black smoke out of my n1 and sputtering horribly bad and i could not go faster than 20 miles an hour for like a good 10-15 minutes. ive tried fuel injector cleaner and it works for a little while but then it goes to shit again. i cant even attempt to break anybody off if my car is gonna die on me. can anyone please give me some suggestions or help. please

 

[AWDTSiTalon]

Check all your intercooler pipes. Sounds like a possible boost leak.

 

[da kang3]

i might have also forgotten to mention that im new to cars, especially tryin to work on them, so coudl u please tell me how i would do this. thanks for the first bit of info though

 

[AWDTSiTalon]

Just make sure all the clamps that hold the intake pipes together are tight.