Why does the engine shake when slowing down? - 1992 Honda Accord

it depends what shakes ? if it only dose it when your slowing right down without braking then it could be an engine mount. if your braking it could be many things from warped disks to track rod ends/ball joints/loose wheel bearings. try and trace the shake. front right-left/steering wheel/back right -left.checks to do are,jack car up and hold the top and bottom of the wheel and shake it/there should be no movement/hold the sides of the wheel and shake it/there should be no movement ( on all wheels ) grab engine and shake it while looking at both sides ( checking engine mounts ) shaking can be caused by a number of things even bad shockers. good luck

check ur mountings and drive shafts or propshaft

Sounds like it's time for new plugs.

Have you checked the engine computer for trouble codes ?

Don't know about the speed sensor, but your spark plugs and air filter could be a problem with the black smoke and rough running.

CLOGGED FUEL FILTER OR WEAK FUEL PUMP CAUSE CAR TO HAVE LACK OF POWER AND SURGE.CHANGE FUEL FILTER,CLEAN FUEL INJECTORS WITH CAN SEAFOAM BY ADDING TO 3/4 TO FULL TANK OF GAS.CHECK FUEL PRESSURE SHOULD BE 41 - 47 PSI FOR 2.0L OR 3.1L ENGINES AND 9 - 13 PSI 2.2L TBI INJECTION SYSTEM.IF FUEL PRESSURE GOOD CHECK TRANSMISSION FLUID LEVEL.FAULTY TORQUE CONVERTER WILL CAUSE LACK OF POWER AND ENGINE SURGE.A STOPPED UP MUFFLER OR CATALYTIC CONVERTER WILL TAKE SLOW CAR DOWN MAKE IT SPEED UP SLOW DOWN SPEED UP SLOW DOWN.

check vacuum lines ,fuel filter,egr valve these three usually dont set off a check engine light when they are going bad or minor leak

If the shaking is caused by the engine you could have a misfire from a worn spark plug or a worn ignition lead, also a blocked fuel injector will have the same effect.

i would check the coil