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 04-26-2007, 01:10 AM
Registered User
 
Join Date: Sep 2006
Posts: 40
88 300CE M103 has No MAF but has KJettronic still cleanable?

Hi,
Found PVC, EGR and MAF should be cleaned on regular basis. Searched and searched couldn't find them on my 88 300CE. It is because my car has none. But my car does have KJettronic instead of MAF. So question is is KJettronic cleanable, how and where? Thanks.

Rick

Reply With Quote
  #2  
Old 04-26-2007, 11:42 PM
deltajetfixer's Avatar
Humble Benzophile
 
Join Date: Dec 2003
Location: Sharpsburg, GA
Posts: 276
My '82 BMW has K-Jetronic. I cleaned the airflap and "throat" in the airbox with carb cleaner. I was replacing the rubber bellows between the airbox and intake manifold and noticed the aforementioned internals appeared to have a maple syrup-colored coating around and on it.

K-Jetronic systems are VERY sensitive to vacuum leaks. Any "false air" that bypasses the airflap will lean the mixture going to the cylinders. Mine is tuned perfectly (and all hoses replaced) and I will stall the idling motor if I unscrew the oil filler cap. I've heard the same is true if I would pull the dipstick but I haven't tried that yet.

If the rubber boot going to your airbox is not soft and supple, replace it. You'll have to remove it to check the cleanliness of the airflap anyway so you'll have a good look at it.

Here's a good site on the theory:http://www.auto-solve.com/mech_inj.htm#MFI08
__________________
2005 Pathfinder LE
2001 E55
1998 M3
1982 320i

Last edited by deltajetfixer; 04-26-2007 at 11:49 PM.
Reply With Quote
  #3  
Old 04-27-2007, 04:58 AM
Registered User
 
Join Date: Sep 2006
Posts: 40
Thanks for the reply,
Now I understand one more thing now. K-Jetronic is not a substitue of MAF at all as I first thought it was. If I am wrong please correct me. Is K-jetronic a fuel distributor or just fuel injector?

Thanks
Reply With Quote
  #4  
Old 04-27-2007, 08:02 AM
deltajetfixer's Avatar
Humble Benzophile
 
Join Date: Dec 2003
Location: Sharpsburg, GA
Posts: 276
Quote:
Originally Posted by wawago View Post
Thanks for the reply,
Now I understand one more thing now. K-Jetronic is not a substitue of MAF at all as I first thought it was. If I am wrong please correct me. Is K-jetronic a fuel distributor or just fuel injector?

Thanks
K-Jetronic (also called CIS, Continuous Injection System) is primarily a mechanical fuel injection system. It started off as just "K-Jetronic", then Bosch added an O2 sensor and frequency valve and it became "K-Jetronic with Lamda Control." It's final incarnation was "KE-Jetronic" which had a differential pressure regulator built into the side of the fuel distributor.

ALL of the variations use a fuel distributor and ALL of the variations use mechanically actuated (by fuel pressure) injectors. Injection pressure is @70 psi and ALL the injectors spray continously.

Lot's of info out there on the web if you care to check.

__________________
2005 Pathfinder LE
2001 E55
1998 M3
1982 320i
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 09:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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