whenever i turn on my car, and put it in reverse, if i touch the gas pedal the RPMS drop and it feels like my car is going to shut off, but it catches itself and does not do it again until the car is turned off, and back on.

i replaced my fuel filter, seafoamed my engine about 4 weeks ago
new plugs, new wires,

its a 2000 cav automatic (2200ohv)
ram air intake is the only mod that would affect the motor at all.

anybody have a clue whats going on?
no lights, and nothing else weird, just the studder when i start it up.

most likely its the (TPS) throttle position sensor, mine is doin the same thing and im gonna test it sometime this week


Kill list:03 eclipse, 06 GTO, 04 Mach 1 Mustang

how would i test a tps? and im also hearing it could be a manifold vacuum leak. any thoughts?