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My car is 15 months old and i'm starting to get vibration when it idles. I don't get the vibration when the engine is cold (rpm around 1100) but when it heats up (i.e rpm drops to 750) the car vibrates. Since i bought my car the rpm has always been 750 when the engine is hot but i have never had vibration before. Therefore i don't think its due to low rpm. It's been a month that it all started up. What could be going wrong?

 
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this is actually in the wrong forum but what kind of sound is it?
have you done any mods to you car under the hood?
i can't even tell that my car is on when i idle and it's been almost a year.
the closest i've came to any rattling is a socket rolling around in the spare tire compartment

 
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if you have an aftermarket exhaust it can rumble and rattle your car hard core. you can fix an exhaust rumble by going to a parts store and getting longer exhaust hangers.

 
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i haven't done any mods to my car. Its just the engine vibrating. How come a 1 year old car could have engine vibration? Any solution?

 
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Try to use a different brand of fuel. I find that some fuel causes the engine to run "rougher". Check if you air filter is clogged up with dirt...dirty air filter makes the engine work harder to suck in the air at idle. Check your plugs and make sure they're clean. While you're at it check the plug gap as well...although the gap should be ok for a 1 year old car. You can also try a bottle of fuel injector cleaner...if you believe in that sort of thing. That's pretty much all you can do w/o going to the dealer. If you decide to bring it back ask them to look at the rough idle problem and they should check the engine mounts and engine vacum pressure.

 
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My car does the same thing[IMG]i/expressions/face-icon-small-frown.gif[/IMG]

 
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had same problem, got some i think EagleOne Injector Cleaner, after i finished the whole tank of gas that i put the solution in, it never rumbled or vibrated again....