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 07-25-2008, 11:57 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 642
How firm is your gas pedal?

I just got my trap removed yesterday, and while they were doing that, they had to put in a new throttle bushing in order to continue..I guess the PO had it jerry rigged somehow.
Anyway, my pedal used to be pretty firm, but now it seems like I am almost flooring it to get up to 1900 rpm (I'm not actually, but it is definitely 60-70% down)
I went back to ask why it was this way, and the mechanic said it was normal. I don't mind too much, I just need to get used to new throttle positions. I don't remember what the other 300d's were like that I have driven, but my other car (not Benz) definitely has a firm pedal
How are your pedals?

ps, with the trap removed, this thing revs like a mother! Although this could have been throttle related, too.

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k
Reply With Quote
  #2  
Old 07-26-2008, 12:41 AM
pawoSD's Avatar
Dieselsüchtiger
 
Join Date: Oct 2004
Location: Grand Rapids, MI
Posts: 15,438
Mine is even and fairly firm.....I lube my joints and bushings at least a few times a year to keep it working well....I can drive along at 25-35mph barely pressing the pedal....so it sounds like yours is out of adjustment....of course at 25mph in 4th gear I am only running about 1000-1100 rpm or so.
__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
Reply With Quote
  #3  
Old 07-26-2008, 12:45 AM
Registered User
 
Join Date: Nov 2004
Location: Nova Scotia, Canada.
Posts: 6,510
Rather than firmness. Have someone press the pedal all the way down. Out front is the arm of the injection pump fully advanced?
Reply With Quote
  #4  
Old 07-26-2008, 12:52 AM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,402
My '87 requires almost no throttle at all to "go."
__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #5  
Old 07-26-2008, 12:59 AM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 642
Sounds like something is wrong..

If I can find someone to push the pedal down while I look, I'll check it out, otherwise it's back to the dealer on Monday to complain! Haha.

Although, I guess as long as I'm not wasting fuel, I can live with it. It's just different than it was before..

The rpms are fine, the pedal just feels..well, dead for half of the way down
__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k
Reply With Quote
  #6  
Old 07-26-2008, 01:16 AM
Jeremy5848's Avatar
Registered Biodiesel User
 
Join Date: Mar 2006
Location: Sonoma Wine Country
Posts: 8,402
In case you don't have anything to worry about . . .

An error my dealer made during the recall on my car just surfaced; you might want to look for it in your car. In my case, the turbo was damaged and was replaced as part of the recall. If your turbo was OK, they might not have disassembled this part of your engine.

Turns out that one of the pieces that compose the intake plumbing (turbo to intake manifold) is attached to the head with three screws in a triangular pattern (the EGR valve mounts on this piece -- easy to recognize) . . . the bottom screw is almost impossible to install and the mechanic skipped it!!!

Over the year and a half since, the plumbing shifted a bit with motion of the engine and gradually worked one of the lower o-rings out until it leaked and I found oil all over the top of the turbo. After taking it apart and cleaning up the mess, I was reassembling when I realized that I had only removed two screws from this piece; where was the third one?

The missing screw is below the exhaust manifold and required all my ingenuity to make up a set of small socket extensions to install this 5mm Allen socket cap screw. You need a mirror to see anything so I don't have any pictures.

Jeremy
__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970
Reply With Quote
  #7  
Old 07-26-2008, 10:18 AM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,765
This bolt is difficult to access even with the engine out, with the engine in it is REALLY difficult.

On my engine they skipped the strut between the forward exh. manifold and the turbo. No pride in dealer mechanics anymore.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #8  
Old 07-26-2008, 11:08 AM
LUVMBDiesels's Avatar
Dead on balls accurate...
 
Join Date: Aug 2006
Location: Red Lion,Pa
Posts: 2,207
back to pedal firmness

Check the pedal itself. Over time the plastic piece that holds the pedal to thr rod breaks and causes you to have to put a lot of pressure on the pedal to make the rod move. A new pedal is around ten bucks. I just did the one on the SDL and it made a world of difference
__________________
"I have no convictions ... I blow with the wind, and the prevailing wind happens to be from Vichy"

Current
Monika '74 450 SL
BrownHilda '79 280SL
FoxyCleopatra '99 Chevy Suburban
Scarlett 2014 Jeep Cherokee
Krystal 2004 Volvo S60
Gone
'74 Jeep CJ5
'97 Jeep ZJ Laredo
Rudolf ‘86 300SDL
Bruno '81 300SD
Fritzi '84 BMW
'92 Subaru
'96 Impala SS
'71 Buick GS conv
'67 GTO conv
'63 Corvair conv
'57 Nomad
Reply With Quote
  #9  
Old 07-26-2008, 01:34 PM
bgkast's Avatar
Rollin' on 16s
 
Join Date: Dec 2005
Location: Vancouver WA
Posts: 6,528
My all stock '82 has a fairly firm pedal. All the linkages are lubed and smooth, so I think it is working properly. There are so many linkages for the pedalto move that it just takes a bit of effort.

I have made a custom linkage on my '79 and it takes hardly any effort. It however does not have any linkages for emissions equipment, automatic transmission, cruise control, etc..
__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine
Reply With Quote
  #10  
Old 07-27-2008, 01:24 AM
Registered User
 
Join Date: Jun 2008
Posts: 45
I have to mash mine to the floor, so reading this has been helpful to realize that perhaps something is wrong. Its my first diesel and the PO said it was normal, yes he was not up front about a couple other things too, I am still discovering those things
Reply With Quote
  #11  
Old 07-27-2008, 02:39 AM
thesst's Avatar
Registered User
 
Join Date: Nov 2007
Location: Ellensburg, WA
Posts: 470
accelerator pedal? I've got an accelerator metal stick.
__________________
'79 300SD
'82 Chevy Chevette diesel
Reply With Quote
  #12  
Old 07-27-2008, 12:23 PM
Hatterasguy's Avatar
Zero
 
Join Date: Nov 2002
Location: Milford, CT
Posts: 19,318
Your supposed to lube all the linkages once in awhile. Put some ATF in a little cup and take a Q tip and drip some in all the linkages.
__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200
Reply With Quote
  #13  
Old 07-27-2008, 05:07 PM
MBeige's Avatar
Registered User
 
Join Date: Apr 2005
Location: SoCal
Posts: 3,746
Compared to what? My go pedal feels relatively firm compared to my friend's Jap cars (Camry, Accord, etc) but compared to the other car, they have similar firmness I suppose. However I haven't taken a peek under the air cleaner of the 300TE to check the throttle linkages and everything but on the D, I have.

One question though, and this is somewhat related. Do you feel a lot of vibration on the go pedal on your cars, or is it more muted? I asked because it feels like the pedal on my '83 felt more vibrant, than the pedal in our old '81 which was very muted and I could not feel much vibration on that. It's like the pedal on my '83 drank a lot of caffeine, it's jittery. So in a long trip my right foot feels exhausted after all the vibration. I've already replaced the firewall bushing that nearly everybody has had experience of going bad (original MB part). Maybe I should lube it again, but that doesn't make much difference though.
Reply With Quote
  #14  
Old 07-27-2008, 09:54 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,835
it looks like I get to be the first jerk to point out that the car has no gas pedal...
it's an accelerator or a fuel pedal...
no gas, no gas pedal...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #15  
Old 07-27-2008, 10:52 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 642
Quote:
Originally Posted by vstech View Post
it looks like I get to be the first jerk to point out that the car has no gas pedal...
it's an accelerator or a fuel pedal...
no gas, no gas pedal...
ohhh!! I was waiting for that, haha!

MBeige, my pedal does not have any vibration, it is pretty smooth.

I am thinking of taking it back to the dealer and complaining, since it is because of their replacing the throttle bushing that I am in this mess. For a day I didn't mind it, but today I got angry with it...

As I mentioned before, it still goes through the power band fine like it did, except minimal throttle is now about 60% foot down on the pedal, compared to maybe 20% before..so there isn't much between minimal and floored.

__________________
Dan
2005 E320 CDI - 246k
1987 300SDL TD05-16g, Herlevi pump, Elbe manifold, 2.47 LSD - 213k
Past: 1987 300D - 264k
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 05:58 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page