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 03-30-2008, 10:34 AM
Registered User
 
Join Date: Mar 2008
Posts: 3
C220

have 95 c220,some times no start,go back a min. later and it takes rt off,or you may try for a hour and it may not start,had a code for the cam sensor,replaced it no diff,fuel pump cks ok,could it be the crank sensor?help no spark?

Reply With Quote
  #2  
Old 03-30-2008, 10:44 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
It could be the crank sensor, but I doubt it. It can't be the cam sensor as the car will start with it unplugged.

My best guess is the OVP. But it could be the crank sensor.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #3  
Old 03-30-2008, 10:53 AM
Registered User
 
Join Date: Mar 2008
Posts: 3
c220

one time it wouldnt start,l sprayed brake clean in the intake,started rt up,sec time it didnt make any diff,no spark,that when the code for the cam came up,acted up 1 time since,in probly 30-40 starts.
Reply With Quote
  #4  
Old 03-30-2008, 11:51 AM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
A crank sensor will not usually set a code. The logic is that if the cranks sensor isn't registering the controller doesn't know the engine is turning, so it obviously can't critique it. A cam sensor code can result though from a bad crank sensor due to the fact that the crank is believed first and if it isn't registering for a moment the cam is seen out of phase.

The OVP just powers the controller so if it isn't on then the controller just stays asleep and has no reason to code anything.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #5  
Old 03-30-2008, 12:24 PM
Registered User
 
Join Date: Mar 2008
Posts: 3
c220

what does ovp stand for?thanks
Reply With Quote
  #6  
Old 03-30-2008, 12:36 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
Got to be absolutely the most common acronym on this forum. It fixes everything, don't ya know

It stands for overvoltage protection. It is like a UPS (uninteruptable power source ... or some such) power supply for various car computors. It is basically just a power relay but it has the ability to clip voltage spikes that could damage the controller. It uses a zener diode that passes voltage at some amount through a fuse to ground. So if you are pumping more than say 18v out of your alternator it takes the extra to ground blows the fuse and protects. It is usually blown by poor jump starts, but yours won't be blown as that would be a permanent problem. If the OVP is the problem on yours it is defective.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #7  
Old 03-30-2008, 12:43 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Quote:
Originally Posted by trailrunner View Post
what does ovp stand for?thanks
Just do a search for OVP. You'll get more hits to read than you can stand.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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 01:33 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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