Ok. So im somewhat new to the whole dsm modding. I recently bought a 1990 laser. When i bought it the owner said that he was hitting some sort of cut off which varied depending on throttle position.

What ive got- a '90 laser thats mostly stock. i have put on an aftermarket boost gauge and boost controller and the car had a cannon muffler on it when i bought it.

What is happening- If the car is in nuetral and i give it full throttle (to the floor) then it will rev to about 5000 rpm's and then act like its hitting a rev limiter and just sputter. If i am in gear and am driving around it seems to do fine. But when i give it more than about 3/4 throttle it will go to about 3500 rpm's (about the time i get it boosting a little bit) and act like its hitting fuel cut. Its like hitting a brick wall, and then it does the sputtering again until i let off to about 3/4 throttle and then runs fine again. I am running about 15 psi right now but when i bought the car i was only runnig about 7 psi and still had the same problem.

What ive done- I have tested it for boost leaks as well as had the timing checked. made sure all sensors were plugged in and done all the "free mods" like removing lower honeycomb and all emmissions. I have a 255lph walbro fuel pump on my dining room table waiting to go in along with a rewire kit (i was told this may solve the problem) but im worried about that being too much for the stock fpr to handle.

Any ideas?