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 05-22-2006, 11:50 AM
Registered User
 
Join Date: Jan 2003
Location: Epsom Downs, England
Posts: 152
No Spark on '93 320CE

Need some help here please....

Car is refusing to start, despite turning over same as always.

Haven't got very far, but confirmed there's no spark.

I'm suspicious of the immobiliser, because of the quality of the installation wiring, but diagrams for these are dealer only. I'm trying to trace 12V power from the ignition switch to the Engine Management Unit, but I can't see a wire on the wiring diagram that goes between them.......

Anyone know if you can still read the fault Codes with a non-firing engine? I'd appreciate some advicce on reading the codes too, I understand this model is not an OBD type?

Thanks for "listening".
__________________
Paul Gibbons
'93 320CE
'73 Jensen Interceptor (Resting)
Giant Full Sus Mountain Bike
Reply With Quote
  #2  
Old 05-22-2006, 12:40 PM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
How have you confirmed no spark? From the coil, or did you take a plug wire off? Those EZL systems are pretty reliable, so you might have a tune problem if you are loosing spark. The ignition module isn't something that goes out much. I would check the coil, and the crank sensor. The crank sensor it eh green single wire plugging into the ignition module. If you have an ohm meter, you can ohm it out, though not a very reliable test, but it is something you can do to rule it out. I believe it should be between 600 and 1200 ohms. You have to check the ohms by pulling it off, and put one terminal of the ohm meter to the center poll, and the other on the side.

By the way, the EZL (ignition system) is pretty much separate from the ECM. Post what happened to have the car before you the no start problem.
Is your car a federal, or a California model? You can read codes, it is very easy. I will check the post later
GVB
Reply With Quote
  #3  
Old 05-22-2006, 01:00 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
That chassis should not be EZL, but rather HFM/SFI... which means you want to check your OVP relay.
Do a search on it and see if you have the old part#.
If so, change it and also look for a blown fuse on top of the relay.
The OVP is power feed for ignition and fuel injection on HFM systems
Reply With Quote
  #4  
Old 05-22-2006, 01:25 PM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
It is an EZL system, in 93 they did not have what you are refering to an EFI system. It is a CIS-E system with an EZL ignition system.
Reply With Quote
  #5  
Old 05-22-2006, 01:27 PM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
My bad, CE, sorry
Reply With Quote
  #6  
Old 05-22-2006, 01:28 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Quote:
Originally Posted by GVB
It is an EZL system, in 93 they did not have what you are refering to an EFI system. It is a CIS-E system with an EZL ignition system.
No, it is an HFM system, exactly the same from 1993 - 1995. I should know. I had one.
__________________
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
  #7  
Old 05-22-2006, 01:33 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
Quote:
Originally Posted by GVB
It is an EZL system, in 93 they did not have what you are refering to an EFI system. It is a CIS-E system with an EZL ignition system.
Sorry , but 104.992 engine was full electronic with distributorless ignition . waste spark ignition w/3 coils /over and MAF ....with OVP power feed to ECU.

For Original poster, here is the part you will need if you find the OVP to be the cause.

http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1M30LAGSC1T40R0NIU&year=1993&make=MB&model=300-CE-003&category=P&part=Overload+Relay

Last edited by Arthur Dalton; 05-22-2006 at 01:38 PM.
Reply With Quote
  #8  
Old 05-22-2006, 02:11 PM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
Got mixed up w/ model,
some did, some didn't
Reply With Quote
  #9  
Old 05-23-2006, 08:32 AM
Registered User
 
Join Date: Oct 2004
Location: England
Posts: 43
GVB

You are wrong - the 320 was only ever fully electronic.

Cars are a technical subject - lets be technical - to all the guys/gals out there, if technical is not your thing, then I suggest you don't mess - a survey I saw somewhere suggested that 30% of all car faults was because of ill prepared persons messing with cars.

Regards
Reply With Quote
  #10  
Old 05-23-2006, 09:18 AM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
I do not believe GVB falls into that category.
He stated his model error and if you read any of his postings, you will see he is familiar with Benz workings.
Reply With Quote
  #11  
Old 05-23-2006, 12:39 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,538
Quote:
Originally Posted by Arthur Dalton
I do not believe GVB falls into that category.
He stated his model error and if you read any of his postings, you will see he is familiar with Benz workings.
Exactly.

After reading most of his posts, I'm willing to bet he works as a Mercedes technician, either at a dealer or an independent.
__________________
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
  #12  
Old 05-23-2006, 12:50 PM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
Quote:
Originally Posted by kth286
GVB

You are wrong - the 320 was only ever fully electronic.

Cars are a technical subject - lets be technical - to all the guys/gals out there, if technical is not your thing, then I suggest you don't mess - a survey I saw somewhere suggested that 30% of all car faults was because of ill prepared persons messing with cars.

Regards

Well, if you want my opinion, it is more like 70% of the time, especially when a mechanic not familiar with Benz works on a Benz. You would be surprised how many different Benz are out there, one year can vary as much as 3 different systems. In the late 90's they started to standardize though. Has gotten much better.

I joined this site for information on WVO and such, but reading all the posts I just had to jump in a give some advise. I have been a Mercedes Tech for about 15 years, all independant. You ask me, the dealer techs are way too narrow minded when it comes to diagnosing.
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 08:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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