First, it's very dangerous to operate an engine when fuel is leaking the way you describe.
Repair the leak and the rest of the problems will probably go away. The leak could be resulting in either a flooding condition or low fuel pressure depending on what's going on. Either way, repair the problem before you have more serious issues to deal with.
DON'T DRIVE IT UNTIL IT'S REPAIRED!!!
If your check engine light is blinking that means an ignition misfire has been detected
If your car is shaking while it is idling, it is most likely your automatic choke. The automatic choke is not operating correctly but if you remove the choke and put a lubricant on it, it should stop shaking.
You most likely have cylinder misfire. Check your ignition coils and spark plugs.
misfire
water pump
Us a small propane torch NOT LIGHTED to supply a little fuel to the area with the engine idling. When the propane finds a manifold crack the engine will increase its rpm. Use proper ventillation and be careful.
Rough idling is whenever the vehicle's motor "misses" or does not fire causing an imbalance and a loss of rotation reducing the motor's power and causing excessive shaking.
A car that is stopped with the engine running.
too much fuel (unburned) getting into the exhaust. could be your oxygen sensor or catalyst converter. less likely, a leaking fuel injector
Same thing on my front wheel drive car. Replace your engine mount(s). The rubber has probably worn. Not too hard of a job. -------------- Check for a mis-firing cylinder also.
Leaking fuel injectors. Catalytic converter... i had same problem. smells like rotton eggs right?
I was having idling problems and found a leaking vacuum hose. My 1.9 had a rubber elbow hose right on top of the engine that had a hole in the bend.