[E92William]

Great I've spent more money sorting the suspension and vibrations on this 328xi than I did on my 335i n54 overall.. and this is way slower

4 new Firestone indy 500s all around.
No front driveshaft
New thrust arms
New slotted front rotors

I've checked under this car more times than I'd like to admit.
What the hell could this be?

[Wolf 335]

Alignment ok?

Engine mounts ok?

Driveshaft hanger bearing ok?

What wheels are you using? Did it take a lot of weights to balance your tires?

[E92William]

The alignment now that you mention it. It's okay it might very slightly pull right but when I had the front tires put on the steering wheel is now turned to the right like 12:30 instead of 12 center

Engine mounts are good

Guibo looks in good shape

Car has stock style 342 wheels I'll check the weights later to see how many it took on each wheel.

I suppose since I dont feel the vibration mainly on the steering wheel, that it is coming from the rear?

[E92William]

Just checked the weights
Front left 1.5oz
Front right 0.75oz
Rear right 2oz
Rear left 1.25oz
Drove today and vibration seems to come mostly from the pedal area and a bit from the steering wheel

[Wolf 335]

Originally Posted by E92William

Just checked the weights
Front left 1.5oz
Front right 0.75oz
Rear right 2oz
Rear left 1.25oz
Drove today and vibration seems to come mostly from the pedal area and a bit from the steering wheel

You watched them balance the tires?

[King Rudi]

Dealt with this a few years ago with the G35. My problem was a brake line. The brake line was damaged causing the caliper to squeeze on the rear passenger side. Took me months to figure out what the hell was going on.

[Bavarian Tech]

Just because a tire is "new" doesn't mean anything really. Those tires could have been on the shelf for 6 months before u got em. Did you have the tires road forced when they were mounted , are any of your wheels bent ? Have you had them looked at ?

[Unknown_Car]

Your brakes worped? Since you get your vibration from the pedal as well.

Find a place to road force balance all 4 assemblies.

Come back here when you have the output values of their findings.

[tlow98]

Originally Posted by FCobra94

Find a place to road force balance all 4 assemblies.

Come back here when you have the output values of their findings.

Bingo. What I had to do recently.

Also found out that one rim was bent, but was able to get along without repair or replacement. Sometimes you win that battle and sometimes you lose.

[haaken675]

Have you checked the wheel bearings? I have a a hum/slight vibration that is not noticeable at slow speeds, but at highway speeds you start hearing it. I'm pretty sure in my case its a wheel bearing. Sounds very similar to when I had to change one on my last truck not that long ago.

[E92William]

Thanks for the inputs.
The Firestone I went to had issues with the roadforce machine so they couldn't do it. Will try another location tomorrow

You can't really go in the back and watch them do the work but I will ask for the roadforce results.

The vibration was really minimal or not there at all this morning when driving so I thought it was good after rear tire balancing but tonight coming back home it was very noticeable @65.

I did the brakes and the calipers didn't look had but I haven't checked the slide pins though I was told they shouldn't be lubed.. No wheel bearing hum either.

Either way will get them roadforce balanced and update here. This might help other folks with similar issues too!

Do not leave the shop without them giving you the figures of each tire/wheel assembly. Just because the machine reads "pass" does not mean that you can rule out road force not being the issue.

[Wolf 335]

Tell them you wanna be there and watch them do it. A lot of these places hire kids that could give a damn.

You can use an excuse such as that you might consider selling the wheels and you want to see if the rim is bent as it spins.

[E92William]

Just came back from Firestone getting all 4 road forced. This is the roadforce results:

Front left 10 Front right 13
Rear left 29/19 Rear right 10
The rear left the guy turned the tire 180 degrees and went down to 19.

I will drive it today and tomorrow and report back. If I feel any vibration I will be requesting that 19 tire be changed.

Nice!

Yeah, typically on this platform I notice "hop" or vibration out of anything more than single digit road force.

19 is high any way you cut it though; anything past that is a default fail for ANY car on those balancers.

The nice thing now though is that you know exactly what each tire/wheel assembly measures in relation to installed corner. Picking out which vibrates and why should be much easier now.

[E92William]

Well first off I screwed up by buying the front and rear tires in different places

Took the rears for warranty at the place and they said it was out of balance by 1.75 oz and to try it if there was vibration they would change it for me. I think imma drive em if I feel anything I'm asking them to replace it and checking with Firestone on the roadforce machine.

Mental note: don't be a cheapskate

[Josh.O]

Last night I installed external LED lights in the cabin of my 330i and everything seemed fine. I took it for a drive and when I got back I sat in the car for maybe 30 to 40 minutes just listening to music with the LED lights on. I accidentally put some weight on the gas pedal while the car was in park (the engine was not running) and all of a sudden I hear a faint mechanical whir under the dashboard and the ac stopped blowing hard. It would make fan noise but not blow cold air hard at all. It seemed to be a quick issue so I just took the key out and turned the car on again. Low and behold the ac worked on full blast for maybe 5 seconds and then got clogged or whatever again. Then things got progressively worse really fast. The brakes locked up and an " ABS" warning light popped up. Then when I tried to press the brake to start the car it would cut off the power completely, then the moment I let go of the brake the radio and lights came back on. Soon afterward I realized that when I press the start engine button the car doesn't start. It just makes a clicking noise from somewhere in the car, turns on the dash warning lights for a split second, and jerks a little but doesn't start. I really need help. I'm currently charging the battery to see if that helps but it won't jumpstart so I'm really scared as this is my only mode of transportation.

[E92William]

Without codes you're kind of throwing rocks^

It could very well be a starter motor.
This is the complete opposite of the section you need to post this in regardless

[E92William]

I should bring up the vibration was lightly noticeable at 75 to 80 after they rebalanced it and kind of got worse after driving for a while with their balance redone on that tire.

I wonder if this is not just a tire issue. Starting to consider the caliper idea..

New tire going on that wheel on Monday then will double check it at Firestone with the roadforce machine.

Well, with a road force machine they can also check if the wheel itself is out of round, if the tire is "bad", or both. Force matching can sometimes get you to an acceptable figure...the hard part is actually finding a shop that isn't lazy/actually knows how to use one of those machines to properly diagnose issues such as you are describing.

Also, amount of weight that it takes to balance is irrelevant...especially when comparing a free-spinning machine to a road force version. Replicating vehicle weight on the wheel/tire is the whole purpose of those machines in the first place. You can balance a cylinder block on a "regular" machine, but that doesn't mean it's gonna roll down the road smooth if you bolt it onto your car.

Also, yeah, if it vibrates at one speed but not the other it's still a road force issue...just at a different frequency. For instance, a 14lb reading will vibrate/hop at a different speed than a 19lb reading. Just because one reads higher than the other doesnt mean it's going to vibrate "more" it just means that it will vibrate within more frequnecies. The more time you spend in that speed range, the more you will notice it, obviously. That's just the way that first, second, third, fourth, etc. harmonics work:
https://excelerateperformance.com/ne...orce-balancing
https://www.brakeandfrontend.com/whe...ance-overkill/

[E92William]

Update
I replaced that one tire with the bad road force and still does it. Drove with the old and new tire back to back and still was the same.

I'm starting to believe this is a drivetrain vibration. Sometimes when you start the car cold and you know let it idle then drive away you'll get this vibration quite noticeable getting up to speed the first time you do it then gets better and disappears when warm. Doesn't happen all the time. Sometimes it'll have a bit of a faint rough idle at cold start. Fuel trims are all between 0 and -10 so no vacuum leak. Might do spark plugs.

These past few days it's been doing it consistently on the highway, felt in the pedals, nothing on the steering wheel.

I'm going to drive it for a while like this see if it gets to a point where I can visually identify a worn out part. This can't be a tire issue at this point.