Hi, I've replaced all engine mount and i have no idea what else I need to repair to get rid of this problem..
I've got 03 mini cooper s with 91k miles. Engine and exhaust shake up and down really bad at idle. I can't notice anything when it's running. i think engine runs strong but i don't know why it's shaking really bad...it happens only when car is warmed up. I can't think of anything else anymore.. Please advise me.

 

Which engine mount did you replace? There are three.

 

lower engine mount, two engine mounts on passenger's side...

 

i think there is something wrong with the air flow. rpm is quiet low when idle and even when ac is on.
rpm is around 700-730 even when ac is on. and it makes a lot of vibrations but when i give little gas to make rpm stable, vibration goes away and it only holds few seconds though.

 

Have you checked your air filter?

 

i've got K&N intake and it's all cleaned and refreshed.

 

How are your ignition components (plugs, wires, coil) looking?
Have you ever changed your fuel filter?

 

I have ngk plugs for 15% pulley and MSD wires and coil. Yes i have changed the fuel filter and fuel pump as well about 6 months ago.

 

vacuum leak?

 

Is there a check engine light on?

 

 

Only when warm means only when it is in closed loop. I would try and reset the adaptives and see what happens. You'll need a good scan tool or go to the dealer to do it.

 

Yesterday I went to mini specialist in Thousand Oaks CA and they've checked if there are any codes but they couldn't find out anything...

 

You can try spraying carb cleaner around the boots to look for un metered air getting in. Maybe seagoam or carb cleaner down the throttle body. So any things on an older car..

 

Can you purchase a scan gauge or scan tool that reads live data?

You need to look at the difference between the two MAP sensors and the calculated load reading. This will tell you right away if you have a vacuum leak in the system.

Be careful with Carb cleaner as it is not plastic friendly.

 

any suggestions for scan gauge or scan tool that read live data? i don't mind buying a bluetooth scan gauge.

 

I bought the veepeak obd scanner for live data and today i plugged in to my car and checked live data while sitting in the parking lot and noticed that there was big graph changes on MAP while car was shaking bad. it was captured when AC was on.

 

Look at the two map sensors and compare them, they should be running parallel with each other with only a minor gap between them.

Also look and see if you can see Calculated Load, this will tell you if the ECU sees something wrong.

You will see the data go up and down as the A/C compressor and fan kicks on as it increases load on the engine.

 

Use a screwdriver as your stethoscope to check your supercharger-waterpump drive. Sounds like SC death rattle from the vids.