I have a 2002 Honda Civic EX that sometimes shakes when I turn it on and just started making a rumbling noise when the AC is on. It goes away when I turn off the AC and then doesn't do it again. It does the same with the shaking. Sometimes it will shake for a few seconds and then stabilize itself, other times it starts normally and doesn't make that rumbling sound with the AC. The car recently overheated, but I turned it off as soon as the gage went up and let it cool off. Did drive it all the way home from vegas like that but with the heater on and the car was fine. Had the radiator replaced but I'm worried that something else might be going on. I have ZERO experience with cars and don't want to be duped out of too much money. HELP!

SOURCE: honda civic wont start

You might have to change the spark plugs or at least have them cleaned.

SOURCE: engine idling varies depending on light or aircon is on/off

dude its normal for first start or cold start that the idle is ok but it must high than normal... its normal because the engine is warming up it self... when it gets warm, the idle speed will return normal idle... your engine is 1200cc, it has not much HP for a great load... and i know its a carburatored engine and its an old engine, your head lyt and a/c fan and aux fan and all the electrical system on your car, uses the HP of you engine and its a lot of load to the alternator driven by the engine to generate an electricity they need and thats why the engine rpm speed lowering down to dead and its shake. thats why when you use your lyts or all electrical, you engine is weakening... the best remede is adjusting you idle speed... its located behind the carburator.. its a small black knob.. just make a twist each eighter way and you'll find out if your idle rpm speed ts incresing or decresing.. just increase it and try opening your lyts and other electrical, if its still shaking then adjust it a little more

SOURCE: Honda civic 1992 twin carburators model.

I dont know where do you live, but honda civic 1992 don use carburator, they are fuel injection, you can have coolant temp sensor problem, or map sensor problem, run diagnose jumping the diagnose wires loated in the passenger side, kick panell close to the door wall, better get the repair book in the parts store to locate the conector ,and read how you can run the diagnosis

SOURCE: Car shakes when I start it

I'm no expert but it sounds like it could be a bad motor mount and since it's a 91 it could have rotted out cuz i know honda's have rubber in their motor mounts.

SOURCE: 2002 civic ex overheating

with your description it sounds like your fans are not coming on, also sounds like the problem was never solved, sounds like you threw a lot of money at your problem also... check to see if the fans are coming on at the right times, seems like a n air movement over the radiator since you say it only gets hot in stop and go traffic... well when your driving at a constant highway speed guess what you have air movement through the radiator... check also a clogged ac condensor with bugs, pressure wash it out so the air can pass through it easily... please rate my help thanks