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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-24-2001, 12:51 AM
Registered User
 
Join Date: Sep 2000
Location: beaumont, texas
Posts: 226
300e rough idle

I recently changed my plugs (copper ones) and plug wires on my 300e. Everything was fine for a week then all of a sudden when I shift into reverse or shift into drive with my foot still on the brake theres a few hickups in the idle but once I get moving all is fine. Do you think the ovp realy may need to be looked at? Im planning to change the fuel filter too so i'll see if that helps any. I know this might sound wierd but before I changed plugs and wires the car felt stronger off the line. but top end is better. I guess what I mean is the car feels a little more softer when flooring it. I guess the saying if it aint broke dont try to fix it holds true .
Reply With Quote
  #2  
Old 11-24-2001, 01:11 AM
Registered User
 
Join Date: Mar 2001
Posts: 326
Not to insult your intelligence but are the plug wires connected properly (all the way) on the plugs? I usually spray a little penetrating oil inside the plug wire boot to ensure is snaps on tightly.
__________________
Scott Diener
89 300E
93 300E
92 Volvo 740 Wagon aka "Mutt mover"
Reply With Quote
  #3  
Old 11-24-2001, 10:29 PM
Registered User
 
Join Date: Nov 2000
Location: Manchester, United Kingdom
Posts: 42
You replace the plug and wire for a while, and run ok, so, I don't really think you plug the wrong wire to the wrong plug.

ok, you press on the brake and reverse? isn't it? well, I think you can check your wire, whether it have a good conduction to the plug and the distrubutor, it possiblly causing by the bad connection, so the spark is not strong enough in high tourque condition, and may be you can try hard acceration, then you might feel it miss fire, this is also the same thing.

I have this situation before, but not in the Mercedes.

hope this can help.
Reply With Quote
  #4  
Old 11-24-2001, 11:40 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
DOes it idle smoothly in Park or Neutral?
I know there is some engine connection of some sort that is hooked to what gear you're in (D, R, or N/P).
Don't remember what it's called though.
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote
  #5  
Old 11-27-2001, 05:33 PM
Registered User
 
Join Date: Sep 2000
Location: beaumont, texas
Posts: 226
Well out of curiosity I added some redline fuel injector cleaner . Didn't help much. I also checked to make sure all wire connectors were secured but no change.
Reply With Quote
  #6  
Old 11-27-2001, 05:53 PM
yal's Avatar
yal yal is offline
Benz-smart
 
Join Date: Oct 1999
Location: New York, Long Island
Posts: 2,705
How wide did you gap your plugs?
Reply With Quote
  #7  
Old 11-27-2001, 09:12 PM
Registered User
 
Join Date: Jul 2001
Posts: 71
Sounds like the ovp relay to me. I had the same problem in the past and replacing the relay solved the problem. They are relatively easy and cheap to replace.
__________________
jayhawk
Reply With Quote
  #8  
Old 11-29-2001, 08:11 AM
Registered User
 
Join Date: Nov 2000
Location: Manchester, United Kingdom
Posts: 42
But where is it located? and how could we check if it working or not???
Reply With Quote
  #9  
Old 11-29-2001, 07:42 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Gary,
Do a search on the OVP... you will come up with EVERY LITTLE PEICE OF INFO you could ever want about it.
In brief it's a commonly faulty relay... called the Overvolt Protection Relay. It can be changed yourself (simply unplugs and plugs in) under the hood, and can be had here from partsshop for about $50.
This topic has been BEATEN to DEATH!!
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rough Idle & Cruse Control Problem 1988 300E billw7 Tech Help 1 09-27-2004 06:58 AM
High Idle 300E -88 (Have preformed search) Sundman Tech Help 28 06-21-2004 04:47 AM
Rough smooth intermittent idle keithed Tech Help 7 12-07-2002 01:31 PM
87 300E runs rough at idle & low speeds, lamda sensor? Mateo Tech Help 3 09-29-2002 06:31 AM
Rough idle on 300E... just got worse PCU2000 Tech Help 24 01-07-2001 02:25 PM



All times are GMT -4. The time now is 11:06 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page