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 12-03-2019, 11:09 AM
PRO VEGGIE CONVERTER
 
Join Date: Feb 2005
Location: Santa Maria CA 150mi North of LA
Posts: 677
1995 E320 drivability issue

1995 Mercedes E320 (M104). Drivability issue under load. Starts and idles well. Low power, possible ignition miss or fuel issue. 16 pin connector, pulled codes from pin #8 and got:
35 02 rich limit, mix to lean
39 Inj short circuit cyl 2
42 inj short circuit cyl 3
47 inj short circuit cyl 6.

Oxygen sensor and CAT are new. Engine wiring harness is updated. Any suggestion on steps
To proceed with diagnosis?

Reply With Quote
  #2  
Old 12-03-2019, 12:33 PM
Registered User
 
Join Date: May 2010
Location: BAKERSFIELD, CA
Posts: 865
Hmm not too sure. What kind of spark plugs and are they at the proper gapping?
__________________
1995 e320
1994 e320
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero
Reply With Quote
  #3  
Old 12-03-2019, 03:26 PM
Registered User
 
Join Date: Aug 2019
Location: Pacific North West
Posts: 544
Quote:
Originally Posted by chiwanga View Post
39 Inj short circuit cyl 2
42 inj short circuit cyl 3
47 inj short circuit cyl 6.

Oxygen sensor and CAT are new. Engine wiring harness is updated. Any suggestion on steps
To proceed with diagnosis?

get a multimeter and check/compare injector resistance
__________________
1990 300SE (Daily driver)
Reply With Quote
  #4  
Old 12-03-2019, 03:30 PM
RobertFini's Avatar
Registered User
 
Join Date: Oct 2002
Location: Millville, NJ
Posts: 241
If you haven't done already, clear all the codes and start over to see which ones come back. I spent some time chasing after codes that must have been from the previous owner and had nothing to do with my issues.

I had the same issue on my '94 E320T S124/M104 (severe miss under load but fine at low power and idle) and it turned out to be one of the ignition coils; while I was in there, I replaced all three coils, the spark plugs and the plug wires. Make sure you use the correct plugs and wires.

Best Regards,
Rob

PS - I'd also be curious to know what you're using to pull those codes.
__________________
Rob Fini

'07 E350T 4MATIC, 220k (wife's)
'06 E320CDI, 223k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 59k
'99 E320 4MATIC, 248k (dormant)
'97 C36AMG, 270k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)

Last edited by RobertFini; 12-03-2019 at 03:32 PM. Reason: Added postscript.
Reply With Quote
  #5  
Old 12-04-2019, 09:54 PM
PRO VEGGIE CONVERTER
 
Join Date: Feb 2005
Location: Santa Maria CA 150mi North of LA
Posts: 677
I pulled codes using an eBay blinking light reader. I made an error in translating codes. They where as follows:

35 air pump
39 egr switch over valve
42 can communication defective
47 control of ignition coil voltage exceeded limits

I cleared codes and idles the car for one min. Code 42 came back. Spark plug threads are covered in engine oil from leaking valve cover gasket. Iím replacing the plugs.
Reply With Quote
  #6  
Old 12-05-2019, 11:18 AM
oldsinner111's Avatar
once a happy man
 
Join Date: Nov 2008
Location: bristol,tn
Posts: 5,826
move to a southern state,where you don't get inspectted,and damn money racket
__________________
plant, and animal life matter. human's had their chance.
Reply With Quote
  #7  
Old 12-05-2019, 02:53 PM
RobertFini's Avatar
Registered User
 
Join Date: Oct 2002
Location: Millville, NJ
Posts: 241
Quote:
Originally Posted by chiwanga View Post
I pulled codes using an eBay blinking light reader. I made an error in translating codes. They where as follows:

35 air pump
39 egr switch over valve
42 can communication defective
47 control of ignition coil voltage exceeded limits

I cleared codes and idles the car for one min. Code 42 came back. Spark plug threads are covered in engine oil from leaking valve cover gasket. Iím replacing the plugs.
Instead of just letting it idle, you might want to put some miles on it to see if any additional codes return and/or go away.

I assume your cause for concern is that the Code 42 is illuminating the Check Engine Light, which would cause an inspection failure. That CAN communication failure code is specific to either the ASR module, the EA/CC/ISC module or the diagnostic module, so all I can recommend is that you try tracing out the wiring to each of the modules and see if there are any breaks, verify that the connectors are clean and tight, check that the electrical grounds are clean, etc.

With regard to the oil in the spark plug tubes, my car also suffered from this and it was a precursor to needing a head gasket replacement; hopefully, this won't be the case for you - good luck.

Best Regards,
Rob
__________________
Rob Fini

'07 E350T 4MATIC, 220k (wife's)
'06 E320CDI, 223k
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 59k
'99 E320 4MATIC, 248k (dormant)
'97 C36AMG, 270k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
'66 230 W110 Sedan (Barn Find, Vintage Racer build in progress)
Reply With Quote
  #8  
Old 12-05-2019, 07:42 PM
Registered User
 
Join Date: May 2010
Location: BAKERSFIELD, CA
Posts: 865
Check your egr line to the intake to see if itís clear
__________________
1995 e320
1994 e320
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero
Reply With Quote
  #9  
Old 12-06-2019, 10:32 PM
Registered User
 
Join Date: Feb 2007
Location: los angeles
Posts: 707
My wifes 94 wagon would throw a can communication code semi regular , I would erase the code , after a while it seemed like I had a low performing battery , as soon as the battery was replaced no more can codes its been
about 2 years and never see that code, im guesing when it sat overnight and you started it the starter was drawing most of the power and then the code would appear, it happens on newer Mercedes too, test your battery

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 07:53 AM.


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