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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-14-2008, 09:29 PM
Benz Lover
 
Join Date: Apr 2008
Location: Scottsdale, AZ.
Posts: 11
190e 1986 electrical problem question

The other day I did something really stupid and grounded out a jumper on a coolant snsor to keep the electric fan on (its 108 degress here in the desert)...one of the alligator clips grounded out on the engine. There was a puff of smke a puff in the dash and the the car cut out, will only run 5 seconds before the engine then dies, yet it will start and run every time for the 5 seconds.
My theory is that I melted a wire that has fooled the engine to think that the engines not running and the computer shuts down the fuel pump. All the fuses are intact and everything works fine for the 5 seconds its running except I noticed the tachometer does not work now. Any advice or where to start troubleshooting this would be appreciated.
Thx John

Reply With Quote
  #2  
Old 06-15-2008, 01:27 AM
Registered User
 
Join Date: Sep 2004
Location: Seattle
Posts: 1,971
Hi,

Things could actually be worse!! You believe you saw smoke from somewhere and if so then that gives you an idea where to look. Also you have a clue in the broken tach. Also if there was smoke then there should be visible evidence of something "burning up" that you should be able to find through visual inspection. Obviously a schematic and the ability to read it (I am an electronics guy but still struggle with the Mercedes schematics) will help but it is not absolutely necessary. Some smart person might tell you where to look. In the mean time if you are so inclined, pull out the area where the smoke was and inspect for the burned area. Then fix what you find. Good luck!
__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
Reply With Quote
  #3  
Old 06-17-2008, 11:32 PM
Benz Lover
 
Join Date: Apr 2008
Location: Scottsdale, AZ.
Posts: 11
Thanks for the insight I'll pull the dash pod and check for the burnt wires on my next 3 days off. Your logic makes sense, is it difficult to replace a tach if I need one ?
Reply With Quote
  #4  
Old 06-18-2008, 02:44 PM
Registered User
 
Join Date: Sep 2004
Location: Seattle
Posts: 1,971
I have no idea! However, I am guessing that the tach is not bad. I am guessing that something on a circuit board burned up. However my crystal ball is getting cloudy.... A schematic might help you if you can find one. You might try your local library. Mine does have car schematics.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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 08:57 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page