AUQ Engine Vibration, HELP PLEASE!!!!

[M. Khodairy]

Hi guys

I have an issue with engine vibration starting when the rpm is 4K
the car is smooth and nice but when the rpm reaches 4000, the car start vibrating extremely specially from the engine side
this thing happens with all shifts

any ideas what it could be ??

cheers

 

[mty12345]

Hi mate, any warning lights on the dashboard when it happens?

 

[dukemaster17]

At that engine rpm its probably exhaust resonation. Maybe the flex section of your downpipe is coming apart.
Check under your car and inspect if everything is OK.
Also if everything is OK then connect a diagnostic to see if you have any error.
Sometimes It's due to loose crank sensor but jerks only on the top end.
If none of that then probably strut bushings and bearings..

 

[M. Khodairy]

Hi mate, any warning lights on the dashboard when it happens?

hi there

No warning lights come up

 

[M. Khodairy]

At that engine rpm its probably exhaust resonation. Maybe the flex section of your downpipe is coming apart.
Check under your car and inspect if everything is OK.
Also if everything is OK then connect a diagnostic to see if you have any error.
Sometimes It's due to loose crank sensor but jerks only on the top end.
If none of that then probably strut bushings and bearings..

I thought so it might be a loose connection
i'll have a look under and inspect everything
hopefully it's not something serious

thanks for the tips

 

[747_727]

Does it do it if you Rev your engine upto 4000rpm whilt stationary? Could it be a worn dmf?

 

[M. Khodairy]

Does it do it if you Rev your engine upto 4000rpm whilt stationary? Could it be a worn dmf?

hello mate

i tried to rev the engine to 4000 rpm while stationary and it doesn't do it
it only happens when I'm driving

I checked under the car but yet nothing came up, everything is in its place and fixed properly


any other ideas

cheers

 

[mty12345]

Long shot, but inner CV joint?

 

[M. Khodairy]

Long shot, but inner CV joint?

Well about that

a month ago I changed both near/side and off/side Drive Shaft that I got from J & R
so they are brand new but I kinda felt this vibration started to show up after I changed them

assuming it's the inner CV, do I have to change it again ??

cheers

 

[teddycatkin]

sounds like c.v. is to blame--get 2cnd opinion off-
a mechanic or someboby who knows to test drive it?

 

[mty12345]

Well about that

a month ago I changed both near/side and off/side Drive Shaft that I got from J & R
so they are brand new but I kinda felt this vibration started to show up after I changed them

assuming it's the inner CV, do I have to change it again ??

cheers

No i shouldn't have thought so. Id just get under there and check that everything is bolted up as it should be. If the vibrations started after the driveshafts were fitted and it only happens when the car is moving then they would be the prime suspects in my mind.

 

[glynnd]

Drive shaft out of balance...

 

[M. Khodairy]

hello guys

thanks to all for all tips given
didn't get a chance to check the drive shafts or CVs yet
a family member passed away so I'm busy with funeral and all

will update you guys once I get a chance to check them

thanks again

cheers

 

[mty12345]

hello guys

thanks to all for all tips given
didn't get a chance to check the drive shafts or CVs yet
a family member passed away so I'm busy with funeral and all

will update you guys once I get a chance to check them

thanks again

cheers

Sorry to hear that mate. Hope you get chance to sort it soon.

 

[M. Khodairy]

Hello again

Finally I got a chance to check both driveshafts and inner CV and both are ok
I've noticed that the vibration does exist while the car is stationary and I rev the engine to 4000 rpm but again it stops after 4500 rpm

Is it the flywheel as mentioned earlier in the post or any ideas ???

 

[Alexis27]

Faulty coil pack tends to cause engine vibration.

 

[M. Khodairy]

Faulty coil pack tends to cause engine vibration.

wouldn't be vibrating continuously and not at a specific RPM ??

 

[mty12345]

Quite possibly the flywheel mate. Hard to tell without actually hearing it.

 

[M. Khodairy]

Quite possibly the flywheel mate. Hard to tell without actually hearing it.

as I see most agree it would be the DMF

I have changed the clutch a while ago but not the dmf, so I think it's time for me to replace all
i'll have a mechanic to check the dmf and confirm

I've been reading about the conversion to SMF, do you guys recommend that, hence my car is stock for now but I'm planning to tune it soon ????

cheers