Arching on distributor cap cause idle drop? - Mercedes-Benz Forum

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 22 (permalink) Old 03-24-2012, 08:27 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Arching on distributor cap cause idle drop?

I am troubleshooting a miss, or dropped idle, when my car is in "drive" and stopped at a light for example. My car has Pertronix fitted and I noticed there is evidence of corroded terminals under the distributor cap. What would cause the arching, and could this be the cause of the stalling out?

If I may, the engine tends to drop rhythmically, such as...

vrrrrrrrrrrrr_drop_vrrrrrrrrrrrr_drop_vrrrrrrrrrrr r_drop_vrrrrrrrrrrrr

...so I don't think it is fuel related. The drop becomes more frequent until it dies.

I can throttle up enough to keep it from dying on me but this almost overrides the brakes. Any suggestions?

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra

Last edited by DirectLA; 03-24-2012 at 08:29 PM.
DirectLA is offline  
Sponsored Links
Advertisement
 
post #2 of 22 (permalink) Old 03-24-2012, 08:50 PM
BenzWorld Member
 
Matvh's Avatar
 
Date registered: Jan 2011
Vehicle: 1969 280 SE Convertible
Location: Central California
Posts: 108
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Suggestion

Check the coil and the ballast resistor
Also make sure the coil and spark ignition wires are in good condition
Matvh is offline  
post #3 of 22 (permalink) Old 03-24-2012, 11:47 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Where's the best place to buy ignition items for this car? Online or can they be sourced at local parts stores? I mean Bosch parts specifically, I have seen non-OEM parts at local shops but presume these aren't worthwhile?

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
post #4 of 22 (permalink) Old 03-25-2012, 08:43 AM
BenzWorld Member
 
Matvh's Avatar
 
Date registered: Jan 2011
Vehicle: 1969 280 SE Convertible
Location: Central California
Posts: 108
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
MBZ Internet sits

Vintage Part Source Parts and Se

Check out these web site for a multiple of choices to purchase MBZ parts.
Do your home work with original MBZ manuals so you know exactly what part you need.

By the way, I had a similar issue with my 280.
I did the coil, ballast resistor, new cap, rotor, points, condenser, and ignition wires.
Greatly improved, but still had a little droop during idle.
I pulled a few plugs and they all appeared ok.
Frustrated, I went ahead and changed all of the plugs.
Sure enough the idle droop went away. Must have been a fouled plug?
But appearance of the plugs would never show it?
Matvh is offline  
post #5 of 22 (permalink) Old 03-25-2012, 02:53 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
I replaced cap, rotor & plugs, no change. I have Bosch coil # 0 221 119 030 and Bosch ballast resistor # 0 227 901 014 as suggested to me coming in the morning and will report my results.

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra

Last edited by DirectLA; 03-27-2012 at 10:00 AM.
DirectLA is offline  
post #6 of 22 (permalink) Old 03-29-2012, 04:33 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Resolution: After installing the new Bosch coil and ballast resistor, the car has not exhibited any of the previous problems, it would seem it was indeed the coil.

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
post #7 of 22 (permalink) Old 03-29-2012, 06:34 PM
BenzWorld Member
 
Matvh's Avatar
 
Date registered: Jan 2011
Vehicle: 1969 280 SE Convertible
Location: Central California
Posts: 108
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Good Job

Isn't nice to solve an issue on a MBZ and make her run like new!
Matvh is offline  
post #8 of 22 (permalink) Old 03-30-2012, 02:36 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Quote:
Originally Posted by Matvh View Post
Isn't nice to solve an issue on a MBZ and make her run like new!
Indeed, these days I can think of nothing more enjoyable. I remember when I chased women, now they chase me in this car but I've already got a mistress with a smooth running inline-six, and oddly she's still a hell of a lot cheaper to maintain!

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra
DirectLA is offline  
post #9 of 22 (permalink) Old 04-08-2012, 05:58 PM Thread Starter
BenzWorld Elite
 
DirectLA's Avatar
 
Date registered: Jan 2007
Vehicle: 1962 W111 220SE Coupe
Location: Cloud City, OR
Posts: 2,289
Mentioned: 1 Post(s)
Quoted: 8 Post(s)
(Thread Starter)
Updating this thread, today I had the same idle drop but it has not happened since I did the coil swap over a week ago and before I did the swap it was missing constantly so I assumed that fixed it. I'm wondering if either (A) the Pertronix system in my car, or something else, is possibly causing coil failures, or (B) if it could be a simple matter of injectors need cleaned?

Further symptoms, it bogs down when I give it more than about 3/4 throttle such as going up an incline or merging with traffic. It died twice while moving at neighborhood speeds.

I also noted the oil on injector pump was very high, read on another forum from a helpful member who suggested this makes the car sluggish. I am correcting the level to see if it makes any change. What do you guys use for the pump, same as engine oil?

-Marrs

The Coupe Group (W111/112 coupes and cabs)official website
The Coupe Group on Facebook


"Too many people are working at jobs they hate, to buy things they don't particularly want, to impress people they don't even care about." --Dr. Deepak Chopra

Last edited by DirectLA; 04-08-2012 at 07:12 PM.
DirectLA is offline  
post #10 of 22 (permalink) Old 04-09-2012, 08:57 AM
BenzWorld Senior Member
 
Date registered: May 2007
Vehicle: 64' 220SEc, 72' 300SEL 6.3, lots of parts
Location: San Diego/Spring Valley
Posts: 512
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I would now check fuel pressure and volume, do a filter while there, check for old hoses, pinched lines too.

Brian O
bostosh is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Similar Threads
    Topic Author Forum Replies Last Post
    M103 & M102 intermittent idle drop & die NAA5550 W124 E,CE,D,TD Class 5 04-02-2016 02:05 AM
    Oil pressure drop at idle bitoy W123 E,CE,D,CD,TD,TE Class 11 09-15-2010 10:42 PM
    Idle drop exit56i95@yahoo.com General Mercedes-Benz 2 09-01-2009 04:22 PM
    Idle drop when aux fan starts triskaideka W210 E-Class 2 06-08-2009 07:20 AM
    380SLC low RPM drop in idle - video mbenzfan79 R/C107 SL/SLC Class 6 02-15-2008 06:47 AM

    Posting Rules  
    You may post new threads
    You may 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 Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome