WTA E39 Engine M54 Jerk violently when idle

[hofmeister]

Hi sifus...want to ask...my M54 E39 Jerk violently when idle juz now at traffic light. it happen suddenly out of the blue.when i accelerate or driving the car is smooth. but when i idle, it will shake/jerk violently.no error shown at all at the control panel.i have checked the engine oil/temparature, all are normal. also my engine mounting was changed few mths back. any idea what cud have caused it ?sorry i have searched this forum high n low but seems like there's a lot of possibility to my problems..crankshaft sensor/PCV hose etc. any advice guys ?

 

[skinhead]

check ur hoses related to idle system. i bet one of them is leaking

 

[hofmeister]

check ur hoses related to idle system. i bet one of them is leaking

any idea how much would it cost for the host?

 

[sewell]

i change my oil seperator valve and the pipeing, all problem gone.

 

[hofmeister]

@sewell @skinhead,

may i know which workshop u went to change? pm me the location. appreciate it.

 

[skinhead]

@sewell @skinhead,

may i know which workshop u went to change? pm me the location. appreciate it.

normally i diy, if i dont i sent my car to afoo...optimum kayu ara

 

[sewell]

@sewell @skinhead,

may i know which workshop u went to change? pm me the location. appreciate it.

i go to WP auto in pandan indah, cheras.

 

[hofmeister]

problem solved! actually solved 2 problems in 1 fix!

spark plug end of life..changed the plugs and now engine smooth gile..
also my rough acceleration problem was gone! now pick up like a sports car haaa

thanks everyone for help