320d e90 lci vibration. Please help

[Cornel]

Nice buddy congrats.

Does this mean the vibration is sorted now?
144wkw and 425nm is strong!

 

[CTR]

Ricardo came over to my house and removed the ecu to work his magic. About 3 hours later he fitted it and we went for a test drive. Ricardo did not have a 320d file to copy from nor did Keithan so he made adjustments to the original file. He also stated that the file was aggressive so he had to turn the boost down and adjust the fueling. On the test drive the vibration was still present and he said it's the torque. We then decided that we will do the xhp gearbox flash on Thursday. The car now revs up a little faster and is smoother across the rev range. Had a chance to dyno her at Rally Cross Motors on Umgeni road today and the results are 144wkw and 425 nm. I'm happy with the results. A big Thank You to Ricardo and all u guys for your help. I really appreciate it.

Congrats. Impressive figures

 

[Diesel]

No vibration still present. I'm hoping the gearbox flash sorts it out. If only the gearbox drops a gear instead of holding on to 6th gear in that particular situation there will be no vibration. I'll keep you guys updated after the flash.

 

[Cornel]

No vibration still present. I'm hoping the gearbox flash sorts it out. If only the gearbox drops a gear instead of holding on to 6th gear in that particular situation there will be no vibration. I'll keep you guys updated after the flash.

If you can please take a video of when its doing it. Just keep in mind what i told you about when you hammer it. Also note that you make a bit more power on 5th and 6 gear. So that means dont sit on 2500rpm in 6gear and add load on it then. I normally gooi my car in sport when i over take, so it goes to 5th and then all it is sort. But that just me.

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Also dont know if its the right way or not (the way im doing it) but it works for me.
And i make a little bit more torque than you and i haven't had any troubles yet.

 

[Diesel]

Gearbox flash is pending as Ricardo is trying to get a battery charger.

 

[Diesel]

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There's a description of when the vibration is present added to the video. First time posting a video so not sure if it's gonna work.

 

[ntuthuko]

Had the same problem eventually Ricardo removed software completely no more vibration now.

 

[Diesel]

Ntuthuko the vibration lessened alot after changing the engine mountings and I don't want to remove the software as I'm enjoying my car even more now. It can be avoided by using SPORT mode or dropping a gear to accelerate. Gearbox software tomorrow. Thanks

 

[Diesel]

I have now done about 300km since the gearbox flash and the vibration is still present but has lessened. It is hardly noticeable. Out of the 10 times that I've tested it the car vibrated 4 times and the other 6 times it dropped down to 5th gear so no vibration was felt. I guess that I'm gonna have to live it.

I think Cornel is right about adding load to the engine at low rpm in high gear. I will take his advice and drop a gear or two when I need to overtake.

Can someone please explain to me how to start a thread in the showroom.

Thanks guys for your suggestions and help.

 

[Cornel]

I have now done about 300km since the gearbox flash and the vibration is still present but has lessened. It is hardly noticeable. Out of the 10 times that I've tested it the car vibrated 4 times and the other 6 times it dropped down to 5th gear so no vibration was felt. I guess that I'm gonna have to live it.

I think Cornel is right about adding load to the engine at low rpm in high gear. I will take his advice and drop a gear or two when I need to overtake.

Can someone please explain to me how to start a thread in the showroom.

Thanks guys for your suggestions and help.

Just looked at your video. You adding to much load low down. Mine did it when i was stock, doing it now as well.
But its not doing it when I'm in M. Thing is with SW your car is way more responsive and the box has a lag in it. So now you trying to boost and the box still needs to figure out what it needs to do. Even with the box flash your box still has a second or two that it needs to think. So best advice is drop a gear or two in M.

I'm probably close to 550-600nm on the wheels now so this is whats working for me so far.

 

[sash]

Hmmm..., I dont know hey....

If i look at your power curve your torque peaks at 2400 and the revs you were at in the video was from under 2000. One thing to note, your dyno seems to be a 3rd gear dyno and a 4th gear dyno is more accurate for the 6hp boxes, so you might find your curve is slightly different in 4th, even 6th when this happens.

I dont load the car at low revs, if i need to pass in a hurry, a quick press of the accelerator will get the tcu to drop a gear and sees my revs in the correct range. Even so, i dont load more than (what feels like) 75% ( based on pedal movement).

I cannot remember the last time i used WOT in Drive mode

 

[Ralf*]

nyc ride. I only get vibrations when I hit the brakes, but then my alignment is totally off and I suspect wheel balancing too.

vibration under braking much greater probability that the disks have become "warped"

My car was inspected today and mechanic says it's the engine mountings. On Monday it will be changed. Will let u guys know.

Hmmmmmm !!


Vibration under acceleration and at a "very specific RPM range", I would actually consider the prop shaft balancing and the "guibo's" connecting the prop shaft to either end (gearbox/differential) and also (if fitted) the centre bearing supporting the prop shaft at mid distance

Possibly the prop shaft is setting up a harmonic vibration (like a bass string instrument) at the specific RPM range, and maybe under load of acceleration this harmonic vibration is amplified

 

[Diesel]

nyc ride. I only get vibrations when I hit the brakes, but then my alignment is totally off and I suspect wheel balancing too.

vibration under braking much greater probability that the disks have become "warped"

My car was inspected today and mechanic says it's the engine mountings. On Monday it will be changed. Will let u guys know.

Hmmmmmm !!


Vibration under acceleration and at a "very specific RPM range", I would actually consider the prop shaft balancing and the "guibo's" connecting the prop shaft to either end (gearbox/differential) and also (if fitted) the centre bearing supporting the prop shaft at mid distance

Possibly the prop shaft is setting up a harmonic vibration (like a bass string instrument) at the specific RPM range, and maybe under load of acceleration this harmonic vibration is amplified

Ralf is there way to fix this or should I get the propshaft inspected or do I just drop a gear when I need to overtake. Ricardo did mention it's because of the torque.

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nyc ride. I only get vibrations when I hit the brakes, but then my alignment is totally off and I suspect wheel balancing too.

vibration under braking much greater probability that the disks have become "warped"

My car was inspected today and mechanic says it's the engine mountings. On Monday it will be changed. Will let u guys know.

Hmmmmmm !!


Vibration under acceleration and at a "very specific RPM range", I would actually consider the prop shaft balancing and the "guibo's" connecting the prop shaft to either end (gearbox/differential) and also (if fitted) the centre bearing supporting the prop shaft at mid distance

Possibly the prop shaft is setting up a harmonic vibration (like a bass string instrument) at the specific RPM range, and maybe under load of acceleration this harmonic vibration is amplified

Ralf is there way to fix this or should I get the propshaft inspected or do I just drop a gear when I need to overtake. Ricardo did mention it's because of the torque.

 

[Ralf*]

Ralf is there way to fix this or should I get the propshaft inspected or do I just drop a gear when I need to overtake. Ricardo did mention it's because of the torque.

I know that there are places that specialize in prop shaft balancing, and it might also be worthy speaking to the more mechanically active members here to possible do or recommend the way to check and or replace the Guibo's and if fitted the centre bearing.

whilst the prop shaft is off the car for the guibo's, if you decide to go down that path, send the prop shaft to a facility that does balancing

my 2c

 

[Diesel]

Ralf is there way to fix this or should I get the propshaft inspected or do I just drop a gear when I need to overtake. Ricardo did mention it's because of the torque.

I know that there are places that specialize in prop shaft balancing, and it might also be worthy speaking to the more mechanically active members here to possible do or recommend the way to check and or replace the Guibo's and if fitted the centre bearing.

whilst the prop shaft is off the car for the guibo's, if you decide to go down that path, send the prop shaft to a facility that does balancing

my 2c

Thank for the advice. If the vibration starts to happen in the other gears then I will look into the propshaft.

 

[AshG108]

Hi. Engine mountings were changed today. R3000 for Febi bilstein mountings and labour. No change vibration still present. Can gearbox mountings or guibo cause this vibration ?

Damn, sorry i did not see this earier bud...I had the same issue on my 2010 320D LCi as well...same symptoms and it was the engine mounts.

Glad you got it all sorted, I was thinking it was the gearbox acting up lol

 

[sash]

Hi. Engine mountings were changed today. R3000 for Febi bilstein mountings and labour. No change vibration still present. Can gearbox mountings or guibo cause this vibration ?

Damn, sorry i did not see this earier bud...I had the same issue on my 2010 320D LCi as well...same symptoms and it was the engine mounts.

Glad you got it all sorted, I was thinking it was the gearbox acting up lol

not Sorted Ash

 

[AshG108]

Hi. Engine mountings were changed today. R3000 for Febi bilstein mountings and labour. No change vibration still present. Can gearbox mountings or guibo cause this vibration ?

Damn, sorry i did not see this earier bud...I had the same issue on my 2010 320D LCi as well...same symptoms and it was the engine mounts.

Glad you got it all sorted, I was thinking it was the gearbox acting up lol

not Sorted Ash

Oh kak,

My bad..sorry OP.

 

[Diesel]

Hi. Engine mountings were changed today. R3000 for Febi bilstein mountings and labour. No change vibration still present. Can gearbox mountings or guibo cause this vibration ?

Damn, sorry i did not see this earier bud...I had the same issue on my 2010 320D LCi as well...same symptoms and it was the engine mounts.

Glad you got it all sorted, I was thinking it was the gearbox acting up lol

not Sorted Ash

Oh kak,

My bad..sorry OP.

After about 300km on the new engine mounting the vibration lessened a lot and now after the gearbox flash it does it maybe 4 out of 10 times. Now it's hardly noticeable. Thanks

 

[sash]

Hi. Engine mountings were changed today. R3000 for Febi bilstein mountings and labour. No change vibration still present. Can gearbox mountings or guibo cause this vibration ?

Damn, sorry i did not see this earier bud...I had the same issue on my 2010 320D LCi as well...same symptoms and it was the engine mounts.

Glad you got it all sorted, I was thinking it was the gearbox acting up lol

not Sorted Ash

Oh kak,

My bad..sorry OP.

After about 300km on the new engine mounting the vibration lessened a lot and now after the gearbox flash it does it maybe 4 out of 10 times. Now it's hardly noticeable. Thanks

If it is an annoying problem, would changing the map to reduce torque slightly at the affected RPM's not help, its not at peak torque at the moment?