I did say ALMOST always.....there are special cases out there like you and your friend. Then there are those who slap it on and immediately have problems like the one he is describing.

Here is what i would do if I were you and that was my car. After checking the obvious things and determining that those are not your problems. I would either invest in a logger and log a few runs and see what is going on or take it to the dyno and have it dyno tuned and see what is going on. If you do either of those two methods I can gaurantee you will find out what is going on. Your best bet is a logger cause dyno time can be very expensive. Either way this should help you eleimante the guessing game you want to avoid.