What could cause the car to dump tons of fuel into it to the point its blows black smoke and you can smell it on your cloths afterwards. Runs like crap and reving it past 2000 rpm is very hard. My friends car.

 

O2 sensors, MAF sensor, TP sensor, leaky injectors... the list goes on.
Can you get any more information on the problem?

 

all good ideas but dont forget the coolant temp sensor

 

I am dealing with same problem. I'll let you know about my resolution once I get it figured out.

 

Turns out the FMU was completely blocking all fuel to the return line making over 100 PSI! Then i replaced it with a new one and now i get 10 PSI!?!?!? If i crimp the return line i can get any pressure i like by how much pressure i apply with the crimpers. I assume the fpr is the culprite.

 

sounds like it, make sure you get a STOCK fpr