arghhh! timing-pertronix-distributor W108 280SE 4.5 - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 12-21-2012, 09:33 PM Thread Starter
BenzWorld Junior Member
 
Date registered: May 2012
Posts: 37
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
arghhh! timing-pertronix-distributor W108 280SE 4.5

Arghhh and arghhh!!!

W108 1972 280SE 4.5L
Installed Pertronix 91885 (Ignitor II & Flamethrower II) -; red to (+), blck to (-) on coil.. and ignition 12V (before resistance) to coil (+)
Removed MB system.
Check resistance from dist. plate to batery - and had 0.2ohms which is correct.
Voltage to coil is 12V with switch to on position.
Spark plug cables are Bosch Ultra.... cooper wires (which AFAIK are not solid core, but im not completely sure)

Set TDC at cyl 1 and 0 at crank. made sure is at compression. (remove cover and align cam marks)
I removed distributor (0231402002) to clean and install ignitor and reinstalled with rotor aligned to lip mark and made sure spark cables are set accordingly to fire order.

Car was working ok with points.

Now Car wont start!!! ...If I rotate distributor to extreme CCW it would start barely, but I run out of the location screw.

I tried reinstalling with one tooth of rotor either way but it doesn't work.

Should I use iginitor I instead?

Any ideas?

Should i reinstall distributor with Crank at 10ATDC? or 10 BTDC? .. or it should always go in at 0 TDC?

PS: The black rotor seats lower than ignitor module .. not leveled on top. (guys at pertronix said not to worry .. ?¿?)

Merry christmas

Last edited by 08AMG63; 12-21-2012 at 09:36 PM.
08AMG63 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 12-23-2012, 06:24 AM
BenzWorld Extremist
 
Date registered: Sep 2012
Vehicle: 300sel W109, 280S 70 , 220s 62. 230 66. Lancia Flavia 63.Pininfarina
Location: Totteridge London.
Posts: 807
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
The ignitor red wire goes to the point where the +12 ignition wire connects at the resistor in,you may be supplying voltage to red wire after the resistance drop - it will not start under that reduced voltage condition.
Adler.
adler is offline  
post #3 of 7 (permalink) Old 12-23-2012, 09:36 AM Thread Starter
BenzWorld Junior Member
 
Date registered: May 2012
Posts: 37
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Quote:
Originally Posted by adler View Post
The ignitor red wire goes to the point where the +12 ignition wire connects at the resistor in,you may be supplying voltage to red wire after the resistance drop - it will not start under that reduced voltage condition.
Adler.
Thanks, I did check that.
08AMG63 is offline  
post #4 of 7 (permalink) Old 12-23-2012, 10:52 AM
BenzWorld Extremist
 
NorCalSL's Avatar
 
Date registered: Jun 2007
Vehicle: '70 280S-'73 450SLC-'81 380SL-'84 500SEC Euro-'92 300SL24-'95 E320
Location: Northcoast of Ca in Eureka
Posts: 985
Mentioned: 0 Post(s)
Quoted: 22 Post(s)
I had a similar problem with my '70 280S. Remove the dist cap and use a small piece of wood and place it on top of the rotor. Give it a good smack with a small hammer to be sure that the rotor is fully seated. The Pertronix is picky about this no matter what the gys there told you.
dws


1973 Mercedes 450SLC (PineGreen/MahoganyLeather)
1981 Mercedes 380SL FORSALE (LtIvory/PalominoMBTex)
1984 Mercedes 500SEC Euro (040Black/BlackLeather)
1992 Mercedes 300SL-24 Signal Red/Black Leather
NorCalSL is offline  
post #5 of 7 (permalink) Old 12-23-2012, 09:54 PM
Lifetime Premium Member
 
Date registered: Sep 2008
Vehicle: 1975 450SL
Location: Phoenix
Posts: 2,432
Mentioned: 2 Post(s)
Quoted: 15 Post(s)
Lifetime Premium Member
Just a few suggestions of things to look at:

There have been tales of difficulties with a Pertronix that proved to be the trigger tabs not lining up with the detector correctly. They have to be just the right amount of the tab at the right distance from the detector.

Could you have the detector placed "one notch off"? You say that you can get it to start by turning the distributor all one way. It almost sounds like you are not triggering at the right time. Make sure that the #1 tab is pointed at the detector when at #1 TDC.

By any chance, did you put on new cap & rotor? There was a guy on the 107 thread that nearly drove himself nuts until he figured out that a previous owner of mechanic had gotten the plug wires one tower off (he'd bought it non-running).

Stand back overnight, get a good night's sleep, and look at it fresh in the morning. I've found more than a few fixes that way.

Good Luck,
Scott

Remember: It's not just a car. It's an Adventure.
RadioTek is offline  
post #6 of 7 (permalink) Old 12-23-2012, 10:35 PM Thread Starter
BenzWorld Junior Member
 
Date registered: May 2012
Posts: 37
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
Quote:
Originally Posted by RadioTek View Post
Just a few suggestions of things to look at:

There have been tales of difficulties with a Pertronix that proved to be the trigger tabs not lining up with the detector correctly. They have to be just the right amount of the tab at the right distance from the detector.

Could you have the detector placed "one notch off"? You say that you can get it to start by turning the distributor all one way. It almost sounds like you are not triggering at the right time. Make sure that the #1 tab is pointed at the detector when at #1 TDC.

By any chance, did you put on new cap & rotor? There was a guy on the 107 thread that nearly drove himself nuts until he figured out that a previous owner of mechanic had gotten the plug wires one tower off (he'd bought it non-running).

Stand back overnight, get a good night's sleep, and look at it fresh in the morning. I've found more than a few fixes that way.

Good Luck,
Scott
Thank you RadioT.. Today the car started and its working!!
The detector ignitor II I got for my dist doesn't have any fixed position. Also the ignitor is not adjustable.... I screw in and that's it, no gap adjustment.

And thanks NorCalSL... I made sure the rotor was pressed in.

Strange, but here is how it worked in case anybody is on the same situation. I'll try my best to describe it.

As I've been doing for the last 4-5 days....Cyl 1 and crank at TDC, Insert distributor with rotor aligned to lip... BUT instead of distributor & rotor pointing at 1 o'clock (like I have been doing), I insert it more like at two o'clock!... Of course still rotor and distributor lip mark aligned, and cyl 1 cable on top.

It's important to mention that this way the distributor base is off of the location hole! After inserting the dist. I had to rotate it CCW (pointing the lip mark to 1 o'clock aprox.) in order to be able to insert the locking screw.... With the screw on, the dist is rotated to the max possible CW.

My dist is 0231401002, not as I reported on the op 0231402002.

This way the car started right away!!! But iddle was kind of high.

Since this distributor lower plate can be adjusted, I removed it and rotate the base CCW as far as possible. This gave me more clearance to adjust timing.

Anyhow still a little high at iddle, I'm very happy it's working and te engine sounds really good. Can't beleive it has 40 years... Sounds like 2.

Still have to check timing.

Last edited by 08AMG63; 12-23-2012 at 10:39 PM.
08AMG63 is offline  
post #7 of 7 (permalink) Old 12-24-2012, 04:19 PM
Premium Member
 
Date registered: Nov 2012
Posts: 1,241
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
Premium Member
use a timing light to see where you are , even at cranking speed it will flash to let you reset the distributor at the right place .
agillot 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



    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