update to high rpm, svs abs and trac light on!!!!!!!

[jelani6428]

since the last thread ive had some work done to the car. Ive replaced the intake manifold gaskets..oil pressure switch..thermostat..left hub assembly(i also think the right one needs to be changed since im hearing the humming sound still)..now with that being said all of the lights are off but yet my car still deccelerates uphills...even at the light when i pulloff as soon as it tries to go into second gear ..the rpm drops far too low ...causing the car to slow down then as soon as it catches it self the rpm shoots back up causing a high and loud REV....any ideas as to what this would be?????