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 09-28-2001, 05:28 AM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
RPM drop when wheel turned all the way.

Whenever I am stopped or going slow and I turn the steering wheel all the way (left or right), the RPMs drop from 600 to 500 for a brief second. Why is this? At first I thought it was the resistance when the wheel is turned all the way (more force to move needed to move car), but it does it when the car is stopped also. Is the power steering pump just sucking more power from the engine??
I am not alarmed and don't think anything is wrong, just curious.
__________________
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
  #2  
Old 09-28-2001, 09:26 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
When pushed to the limit power steering can draw upto 6 hp! Takes a few milliseconds for the idle computer to catch up to this sudden power draw! When you turn the A/C on the pushbutton sends a signal to the idle ECU a few milliseconds before the compressor comes so that it doesn't kill the engine.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 09-29-2001, 02:41 AM
zee's Avatar
zee zee is offline
Registered User
 
Join Date: Aug 2001
Location: Chennai,India
Posts: 28
.............and thats when the idle control unit comes into play
__________________
1990 220TE
1988 300GD
1989 yamaha V-MAX(sold)
1993 BMW R100R
1956 Willys Jeep(low bonnet)
1982 Honda XL 250
1987 300D
1994 toyota surf (4runner)2.4 TD EFI
1953 Land Rover
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
"Sportier" steering wheel for W123? jbhebert Performance Paddock 1 05-05-2004 02:17 PM
Vacuum pump mechanical wheel & drive track questions. ORIGINAL TOPIC! Matt Petty Diesel Discussion 7 07-13-2003 04:00 PM
Centering steering wheel after alignment MarkM Diesel Discussion 17 03-29-2002 11:11 PM
Wheel offset 35mm/41mm/47mm etc.?? supermech2001 Wheels & Tires 1 11-01-2001 02:52 AM
rear wheel bearing 190 Jovan Tech Help 1 05-21-1999 11:00 PM



All times are GMT -4. The time now is 09:49 PM.


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