As you might remember my car threw the code P1407. The egr valve code. Well I decided to make a friend help and we are gonna clean all egr passages we can get to. My question is, will this make my car run like crap. At WOT it misses really bad (I can't even get the back tires to slip). I thought tune up before the light came on but everything checked out good. Will the egr passages being blocked make my car run this bad?