check your timing and motor mounts and make sure all cylinders are igniting when needed these will most likely be the answer to your problems!
The engine is not hitting on all cylinders or the distributor (electronic or manual) needs adjustment.
A miss or A collapsed engine mount or A imbalance caused by a failing component, harmonic balancers and torque converters are common.
bad/partially blocked catalytic converter. - kind of a rotton egg smell, right?
Try checking your engine mounts and bolts. On my Engine was it a misfire condition,the sparkplugwire from cyl #6 came loose I have a 96 Camaro RS 3.8 L.The other time it was a small Vac Line by the Throttle body,that caused a bad shake
Bad engine cushions can make the engine shake. bad spark plugs cause malfunction as the car starts running.
A clogged muffler can.
Yes, when idling and driving.
The "check engine" light should be illuminated. Start with investigating the code(s). They may lead you to the cause.
Because even when its just idling, there are 100 small explosions every second inside of it with a powerful heavy metal crankshaft rotating 1500 times per minute. You could have a bad engine mount.
need to replace the intake manifold gasket
spark plug gap Can also be a vacuum leak.
If the check engine light is blinking , that means a cylinder misfire has been detected