3k RPM IDLE, stuck check engine light no response from Gas pedal
 

Well when it rains it pours..
I was driving to work,going maybe 60, was planning to speed up so i floored it and dropped it to 3rd form 4th and my check engine light went on and i lost all response from my accelareter..pulled over and the engine was still on, but idling at 3k RPMs... turned the car on and off and same idle, still no response from the gas pedal..so i turned it off, made some calls, about 5minutes later i started it again, but now its normal with the exception of my CEL..
Any Ideas at all? makes no sense to me
just installed a midpipe a couple 100 miles ago..
but i dnt think thats going to have anything to do with that..