Problem at 13-14 psi?

Today while comming home from school I got onto the freeway. And while getting on the free way i floured it. But then all of a sudden around 13-14 psi I felt like a repeated hitting feeling. I dont know how to explayin it but it feels like when you drive over the yellow markers on the side of the road, but faster.
And also when that problem started another problem came up. When ever the engine is cold and i start it, i hear a thumping sound in the engine (it goes away in like 1sec tho).

So i really dont know what to do now. Could the first problem be fuel cut? or could it be caused by a boost leak?

The problem started a couple days after the transmission shop rebuilt my transmission. So they may of fucked up on reconecting all the lines and pipes.

Any suggestion is welcome!

Take it back to the tranny place and show them what it does now........
Stop beating on your car? lol
You might want to check your plug gaps if it only "hits" at 13-14 psi.....

it sounds like a boost leak and your hitting fuel cut. Defintaly check that first since its easy to check and they would have taken off the pipes to drop the trans.

it sounds like a boost leak and your hitting fuel cut. Defintaly check that first since its easy to check and they would have taken off the pipes to drop the trans.

Yeah, I went to the transmission shop today and they said its not the transmission. The guy there said it could be the fuel filter. So then i took it to the mechanic shop i always take it to and the mechanic there said it could be the spark plug wires. So im really not sure what it is.

Would a boost leak cause me to hit fuel cut?

I'll probably do the boost leak this weakend.