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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 06-02-2003, 12:00 PM
Registered User
 
Join Date: Feb 2001
Location: Austin, Texas
Posts: 70
Unhappy Injector Knock to Engine Loping/Miss

1987 190 Dt

Hello,
I recently changes out my injectors due to them knocking loudly, but the engine was smooth.

I changed them out with rebuilt ones and now the engine has a lope or miss. The engine shakes and it has an audible miss from the exhaust. It is very quite running know but has the lope.

I changed out both fuel filters and this made no change. I did notice that my old injectors all had the same # in the 400 range and the rebuilt all have this 135 # on them. Does this # mean anything or can I have bad rebuild's???

Any help appreciated!!!

Reply With Quote
  #2  
Old 06-02-2003, 01:19 PM
Registered User
 
Join Date: Jul 2002
Posts: 1,141
LEt's see,

Yes you can have bad rebuilt injectors. It's not that uncommon-even with Bosch rebuilt injectors. Must admit, I have not had a problem with spray pattern-but Stu RItter owned a shop in Colorado, and had made comments to this effect.

Lope- Lope if the engine is running correctly, is due to compression or the injectors are not popping at the same pressure. Bosch spec is + or - 5 bars. Mercedes spec is deviation for an engine should not exceed 5 bars.

I'm guessing the 135# number is probably 135 bars, which would be the nominal pop pressure for the injector.

Injectors need to pop at the correct pressure and have a good spray pattern for even combustion.

I'd crack injector lines one at a time to find your bad injector.

Michael
__________________
Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
Reply With Quote
  #3  
Old 06-02-2003, 01:26 PM
Registered User
 
Join Date: Jul 2002
Posts: 1,141
Sorry,

Note that the bosch spec is twice as large for an injector as what mercedes recommends for a set of injectors. People do talk that a matched set of injectors (1-2bars) will result in very little engine shake.


Michael
__________________
Michael McGuire
83 300d
01 vw A4 TDI
66 Chevy Corsa
68 GMC V6 w/oD
86 300E
Reply With Quote
  #4  
Old 06-02-2003, 01:28 PM
Registered User
 
Join Date: Feb 2001
Location: Austin, Texas
Posts: 70
Thanks for the info! I figured that it had to be the injectors. It ran smooth before, it was just way too loud.

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 11:02 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, 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