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  #1  
Old 04-16-2008, 06:52 PM
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Join Date: Oct 2004
Location: McAllen, TX
Posts: 369
240D Tach mod quesiton/problem

I added a tach to my 240D a few weeks ago just like what was posted in this thread:

DIY tach for 240D w EGR- easy!

My question is why would my tach peg when the horn is honked? I just noticed this last week as a rarely use my horn. I know my grounds are good, i cleaned and tigthened all of those when i bought the car. I can't pin this one down. Other things like the compressor switch (temp dial) etc will make the tach jump just once in a while very briefly like 100-200rpm worth. The horn however will peg the tach if you hold it down. Anyone have any ideas?
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Old 04-17-2008, 02:03 AM
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Join Date: May 2007
Location: Out in the Boonies of Hot, Dry, Dusty, Windy Nevada
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Quote:
Originally Posted by ascalise View Post
I added a tach to my 240D a few weeks ago just like what was posted in this thread:

DIY tach for 240D w EGR- easy!

My question is why would my tach peg when the horn is honked? I just noticed this last week as a rarely use my horn. I know my grounds are good, i cleaned and tigthened all of those when i bought the car. I can't pin this one down. Other things like the compressor switch (temp dial) etc will make the tach jump just once in a while very briefly like 100-200rpm worth. The horn however will peg the tach if you hold it down. Anyone have any ideas?
Give FUNOLA a PM, maybe he can help you since he is good at these
projects.

I would guess a ground problem some where, maybe a seperate ground
for the tach?

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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