318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Maintenance

Notices

Maintenance Service Interval questions, oil change info.

.
» Recent Threads
1999 M-Sport For Sale
12-31-2023 05:10 PM
Last post by Coop540iT
03-23-2024 06:39 PM
1 Replies, 105,349 Views
Once again 318ti owner...
03-20-2024 12:39 PM
Last post by two30grain
03-22-2024 02:04 PM
1 Replies, 68,388 Views
What brakes do I...
03-20-2024 03:27 PM
Last post by huirtera
03-20-2024 03:27 PM
0 Replies, 65,626 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 08-16-2012, 10:22 PM   #1
DaedHead8
Senior Member
 
DaedHead8's Avatar
 
Join Date: Jul 2008
Location: Rensselaer, NY
Posts: 254
iTrader: (1)
Default Odd Vibration During Acceleration

So for the past couple of weeks I've been getting an odd Vibration while accelerating. It only ever vibrates three times and it is much louder under heavy acceleration compared to light acceleration. It also only seems to happen between 3,000-4,000 RPM. Sometimes I think I feel it even when staying under 3,000 RPM, but I'm not sure, it's very light if it is happening. It also only seems to happen in second gear, none of the other gears are affected. This thread has me thinking it could be the fuel pump, since I do think I'm experiencing a slight lack in power, however I do not have a supercharger like the poster of that thread does.

The car is an automatic '99 with 130,000 miles on it. The check engine light is on but I haven't read the code yet, I just assumed it was an evaporative system failure, since I got that code repeatedly around this same time last year. Would a fuel pump that is going bad cause a CEL?

Thanks in advance for any help you can give.
__________________
DaedHead8 is offline   Reply With Quote
Old 08-17-2012, 02:01 AM   #2
teen ti
Senior Member
 
teen ti's Avatar
 
Join Date: Jul 2009
Location: Ft Defiance, AZ
Posts: 686
Vehicles
iTrader: (0)
Default

driveshaft assembly, motor mounts, front sway bar assembly. probably one of those, check out some threads of mine and my dads (joe1602) and you should have a good start. We had the same thing happen on ours, SAME THING. hope it helps, good luck
__________________
1999 BMW 318ti
2005 MINI Cooper S

teen ti is offline   Reply With Quote
Old 08-17-2012, 01:18 PM   #3
joe1602
Senior Member
 
joe1602's Avatar
 
Join Date: Jan 2010
Location: Horseheads, NY
Posts: 259
Vehicles
iTrader: (0)
Default

Yes, take a look at some of our earlier posts about this. I have to now replace the center carrier bearing. I am almost sure that is the knock. I am actually going to replace the whole driveshaft with a remanufactured one when the funds & lift become available. Ours however is a 5 speed and I am not sure of the mechanics of the automatic driveshaft. Ours knocks at the same RPM in 1st and 2nd gear only under HARD acceleration. Good Luck!
joe1602 is offline   Reply With Quote
Old 08-17-2012, 03:28 PM   #4
Mr.Squeelerz
Senior Member
 
Mr.Squeelerz's Avatar
 
Join Date: Jul 2008
Location: South Central, MN
Posts: 1,065
iTrader: (3)
Default

Inspect the guibo for cracks or disintegration.
__________________
Mr.Squeelerz is offline   Reply With Quote
Old 08-19-2012, 05:49 PM   #5
DaedHead8
Senior Member
 
DaedHead8's Avatar
 
Join Date: Jul 2008
Location: Rensselaer, NY
Posts: 254
iTrader: (1)
Default

Thanks for the tips everyone. Turns out I won't get to give it a proper inspection until next weekend. I'll be sure to take it easy on the throttle until then and bump this thread when I have something to report.
__________________
DaedHead8 is offline   Reply With Quote
Old 08-26-2012, 05:23 PM   #6
DaedHead8
Senior Member
 
DaedHead8's Avatar
 
Join Date: Jul 2008
Location: Rensselaer, NY
Posts: 254
iTrader: (1)
Default

So we took a peek under the car yesterday to see what was up. Unfortunately we spent most of the day repairing the driver's side window which was on the verge of falling (again), so we only got a few minutes underneath the car. We didn't see anything obviously broken. One of the universal joints near the cat was a little loose so it might be that. We're going to dedicate an entire Saturday to diagnosing this problem in about two weeks. I wish it could be sooner but at least I'll have plenty of time to read the prior threads on this and look up some diagrams on realoem.com so I can tell what I'm looking at. Thanks again everybody!
__________________
DaedHead8 is offline   Reply With Quote
Old 08-26-2012, 09:42 PM   #7
zoner
Senior Member
 
zoner's Avatar
 
Join Date: Oct 2008
Location: Los Angeles, CA
Posts: 1,464
iTrader: (7)
Default

Quote:
Originally Posted by DaedHead8 View Post
One of the universal joints near the cat was a little loose so it might be that.
If that is, in fact, the case- I'm about 99% certain that is where the problem is. Replace the driveshaft and giubo (and transmission mounts, as long as you're going to be in there) and be done with it for another 100k+ miles...
zoner is offline   Reply With Quote
Old 08-27-2012, 10:58 AM   #8
dahamler
Senior Member
 
Join Date: Aug 2007
Location: Monterey, CA
Posts: 770
iTrader: (11)
Default

Driveshaft U-joint. It took me 2 months a two guibos and center support bearing to figure this out. I need to remove the driveshaft and actually exercise the U joint to feel the binding.
__________________
dahamler is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel pump and vibration Zigfried Maintenance 6 12-18-2010 01:17 PM
1996 M44 90k miles, vibration problem gabe3 Engine 1 11-20-2009 11:05 PM
Driveline Vibration (HELP!) mgbman69 Maintenance 22 06-11-2009 02:04 PM
Vibration in wheel first_bmw Lounge 2 05-29-2006 08:51 AM
Intermittent Vibration BMWVW Misc 18 11-13-2005 06:52 AM


All times are GMT +1. The time now is 11:12 AM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2024, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 90.26 k/106.21 k (15.02%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.