Alright so since the d15b vtec swap it's been all good, except now for some reason it starts bogging at 3,000 rpm. It doesn't always do it, just sometimes and 1st gear almost never does it. And when it bogs down and decellerates (even with pressure on the gas pedal) it puts out this AWFUL smell it stinks like burning ASS. Then I have to nearly floor it to get it to run right. Any ideas? It always seems to run just fine the closer I get to full throttle but it bogs down and smells like something nasty's burning if I drive slow and get near 3,000 rpm.