Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-11-2010, 06:34 PM
Registered User
 
Join Date: Mar 2005
Location: Yountville, CA
Posts: 1,175
'82 399SD Bouncing Tach Needle

Purchased a used tach amp off of EBay -first couple days it worked perfectly, now the tach needle is bouncing all over the place but relatively stable at idle . . . . . any thoughts? Thanks!

Reply With Quote
  #2  
Old 03-11-2010, 07:38 PM
tbomachines's Avatar
ಠ_ಠ
 
Join Date: Mar 2009
Location: Philadelphia
Posts: 5,859
Sounds like you bought a bad tach amp. When mine kicks in, it bounces all over the place then dies right back again. Might as well spend the money and get a new one from fastlane if you want the tach.
__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
Reply With Quote
  #3  
Old 03-11-2010, 09:19 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Techguy512 here on the forum sells solid state units.
__________________
83 SD

84 CD
Reply With Quote
  #4  
Old 05-26-2010, 07:28 PM
Doktor Bert's Avatar
Das Sturm Uberdoktor
 
Join Date: Jan 2005
Location: Palm Springs, CA.
Posts: 2,670
Would a 1978 300SD have a tach amp????

I have the same problem even after swapping adapters and tachometers...

I have an unknown clicking in the passenger's footwell in perfect time to the tach needle bounce...Robert
__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

Last edited by Doktor Bert; 05-26-2010 at 07:59 PM.
Reply With Quote
  #5  
Old 05-26-2010, 10:16 PM
Registered User
 
Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
Posts: 9,585
82 399SD ? Thats almost a 4 liter, I hear those are really fast.

Charlie
__________________
there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works
Reply With Quote
  #6  
Old 05-26-2010, 11:25 PM
H-townbenzoboy's Avatar
Now Y2K Compliant
 
Join Date: Jul 2003
Location: Houston, TX
Posts: 4,201
Quote:
Originally Posted by Doktor Bert View Post
Would a 1978 300SD have a tach amp????

I have the same problem even after swapping adapters and tachometers...

I have an unknown clicking in the passenger's footwell in perfect time to the tach needle bounce...Robert
Yes, your 78 should have a tach amp, too.

__________________
Board Member of MBCA|Houston

81 MB 300SD, 82 MB 300D Turbo (sold), 04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page