Ok so I was at the dragstrip last weekend and was runnin the 100 shot and had a nitrous burp. Besides blowin out the filter in the front mount intake, i blew off the intake from the throttle body and vacuum lines off the intake manifold. My car runs rough when u start it up and puffs black smoke, but only for like a minute until the check engine light kicks on and throws it into limp mode, then no smoke and smooth idle, but i cant rev past 6000 rpms? Please somebody help me out and tell me what causes no intake pressure. I know because of vafc says -3 kpa all the time.

 

you probably need to check the engine codes sicne the check engine light is on.

 

Some fast and furious ****.... J/k

plug up everything that was kicked off........
Make sure your vacuum lines are plugged in the manifold - otherwise your idle will always be rough.....yeah, and pull the code.

 

limp mode, super rich, sounds like u roasted a sensor

why havent u checked the CEL?