My 8 is abit shaking, seems like the car idling is not steady sometimes. I tought It might need new engine mount or misfire problem, but I went to dealership lastweek, there is no misfire problem and engine mount is fine too. what is another problem can cause car shaking? if I change spark plug cable and coil is that will make it better?
Dealer said it might need clean the carbon inside the engine with a can of blah blah ( i cant remember the name of the chemical ) but that will cost around 3 hundy and they will not sure that will help the problem, but they said the car is running smooth... sigh...
Please help, what should I do......................
Thanks guys.

 

mines doing it too, try changing out the coils/plugs/and wires...it should help i ordered my coils today

 

how many miles? any mods? is everything stock?

My first thing would:
-Replace coils
-Replace wires
-Replace spark plugs
-sea foam the motor you can do it yourself the can costs 20 bucks, also a DIY thread on here read that
-also cleant he MAF sometimes oil can get in the intake if you over fill the oil. is very common actually. check that out woul dbe my things. if all else fails ask for a compression test.

 

seafoam the engine is what they are talking about search....it will cost you like 20 dollars to DIY

 

how many miles are the on the car? what year is it?

 

its 57K miles right now. and year 04, manual. everything is stock. thanks

 

yeah yeah, its seafoam the engine they were talking about. how to diy?
how long it will take. thanks

 

yeah, do the "preventative maintenance" first, this is a sports car, not a honda ^^^^look at the previous posts and go from there

 

dude!! change the coils wires and plugs for crying out loud!!! i change min ever 20K miles and i clean them at 10K miles since they get all brownish and hard carbon on them.

 

well the enitre process usually take about 3 hours and thats including the time you have to wiat to let that stuff set in. there is a great DIY read it up or send me a private message and i can walk you through it. very simple thing to do.

 

thanks, I will order them today, and replace them first.