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#1
03-11-2010, 05:34 PM
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'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!
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#2
03-11-2010, 06:38 PM
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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.
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
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#3
03-11-2010, 08:19 PM
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Techguy512 here on the forum sells solid state units.
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83 SD 84 CD
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#4
05-26-2010, 06:28 PM
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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
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 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 06:59 PM.
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#5
05-26-2010, 09:16 PM
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82 399SD ?
 Thats almost a 4 liter, I hear those are really fast.  Charlie
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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
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#6
05-26-2010, 10:25 PM
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Quote:
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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '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.
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