my check engine light goes on and i turn the car off and on then the car starts to rev up and down do i have to fix or replace someting or wat is the problem motor is all stock plus when i brake my car shakes like my tires are loose wat could be that problem if u guys have any ideas on wat could be the problem i would like to know thanks

 

the shaking while braking is probablly cause your rotors are warped...you have to check the codes on your ecu too see whats causing the check engine light.

 

Have the calipers checked.

 

Shimmy under braking is very comon,is most often caused by over torqued lug nuts, inspect caliper slide pins and pistons, measure rotor thickness, 17mm is minium thickness, resurface rotors ON CAR per honda recommendation for best results, replace pads as needed and torque wheel nuts to 80ft.lbs. with a torque wrench honda also recommends moly-kote on backing and moving surfaces.
Is car multi or dual point ? D/P cars check codes first ,then throttle cable free play,coolant level, TW sensor should have approx 5.v cold .5v hot,clean EACV, se rvice bulletin for TPS ground update.
M/P cars also check fast idle valve and coolant hoses to fast idle valve, both hoses should be hot with engine temp. remove two screws from f/i valve when cold ,remove cover plug hole in center,if idle returns to normal repl, valve