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 ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-26-2001, 11:43 AM
Inky Winky
Guest
 
Posts: n/a
Unhappy Engine cuts off @3000 RPM

Hello everyone. This is my first post. Hopfully you may be able to help me! Two weeks ago, my engine started to cut off @3000 RPM. The transmission shifts normal between 2000-2700 RPM. However, if I press on the gas, it cuts off @3000 RPM regardless of the grea that I am in! When I'm crussing on the highway, it still does not let me go pass 3000 RPM making my top speed 72 MPH. I you guys can give me any inputs I will realy apreciate it. Thanks in advance.
PS. I will be reading the other threads to see if I can put in some of my input!
Reply With Quote
  #2  
Old 09-26-2001, 11:44 AM
Inky Winky
Guest
 
Posts: n/a
I forgot:
It is a 1995 C280.
Reply With Quote
  #3  
Old 09-26-2001, 12:28 PM
wellington-1
Guest
 
Posts: n/a
3000 rpms

Inky -

I had the same problem. You need to have the Fuel Pump relay checked. This relay switch may have a governor that restricts rpms to 6,000. If so, it has gone bad - I am 99.9% sure this is your problem.
Reply With Quote
  #4  
Old 09-26-2001, 12:34 PM
Inky Winky
Guest
 
Posts: n/a
Smile

Thanks for the quick response. Where is the fuel pump relay located?
Reply With Quote
  #5  
Old 09-26-2001, 12:44 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
The fuel pump relay on a C280 does not have any decision making capabilities. It is a dumb relay that has its decisions made by the HFM controller.

You should check for fault codes in the HFM and EA/CC/ISC modules.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #6  
Old 09-26-2001, 12:51 PM
wellington-1
Guest
 
Posts: n/a
OOPS

Thanks Steve - I just saw the first post and didn't realize it was a C280.
Reply With Quote
  #7  
Old 09-26-2001, 01:02 PM
Inky Winky
Guest
 
Posts: n/a
Smile

Steve: Thanks for the clearing up! Where is the HFM controller located?
Reply With Quote
  #8  
Old 09-26-2001, 02:46 PM
Inky Winky
Guest
 
Posts: n/a
Question

Someone told me it might be the OVP. Is that true?
Reply With Quote
  #9  
Old 09-26-2001, 06:58 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
I doubt it. The OVP causes much different problems with the HFM systems. It could cause the car to stop running, but I can't think of any reason why it would do it repeatedly under rpm conditions.

You need to know what is ceasing when the car cuts out. The simlest start is to read the fault codess. It may lead nowhere. There are many things that self-diagnostics won't cover but real testing is complicated.
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #10  
Old 09-26-2001, 10:23 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
InkyWinky,

Your car seems to be acting as though the rev limiter is at 3,000 RPMs, instead of the regular 6400 (or close to) RPMS, correct?

SteveBFL, what controls the rev's? In other words, what 'chip' or relay controls the rev limiter? I have heard once before that the contacts in there got dirty and it was causing rev limiting at the wrong time.
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
Reply With Quote
  #11  
Old 09-26-2001, 10:33 PM
Moderator
 
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
There are many "limp home" substitute values that modern controllers institute to protect them selves. I know of one at 4000rpm and one I think around 1800 rpms. I know of nothing at 3000 rpms.

Most of these strategies are involved with throttle control. The system most responsible is EA/CC/ISC or CC/ISC (electronic accelerator/cruise control/idle speed control).
__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
Reply With Quote
  #12  
Old 09-26-2001, 10:52 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Ohhhh, ok, I see now.
That makes perfect sense. Inky, you must take it in to have all of the codes read!!! Good luck and let us know what it was!
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil Additives Bill Wood Performance Paddock 6 08-24-2011 11:53 AM
ML320 Engine Shuts down at 4000 rpm PEO'R ML, GL, G-Wagen, R-Class, Unimog, Sprinter 20 03-03-2006 08:53 PM
Engine cutout/sputter above 4300 RPM Gregg Bambo Jr Vintage Mercedes 8 03-25-2003 10:51 PM
Engine cuts out after 10 minutes PhilTilson Tech Help 3 04-11-2002 08:01 AM
Diesel Engine Break-in Mileage Mercedes Man Diesel Discussion 10 03-22-2002 12:57 AM



All times are GMT -4. The time now is 09:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page