97 V230 - Twitchy Throttle Response (On/Off feel) - Mercedes-Benz Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 03-20-2007, 01:11 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
97 V230 - Twitchy Throttle Response (On/Off feel)

Anyone else have a V230 with a twitchy throttle? By twitchy I mean that (at least in 1st & 2nd gear) it has a very on off feel...especially when pulling away from a full stop.

What I think it is is an overly STIFF spring of somesort in the throttle linkage somewhere. This stiff spring makes it very difficult to modulate the throttle input softly...especially when one is in a rush to pull away. It usually ends up in an over-rev and some clutch slip.

As I do a lot of city driving, this is quickly getting annoying. Never experienced this on other cars I've owned. (Fords, Chevy's, Audi's, Opel's, VW's, and the list goes on and on...not to mention bikes)

Just wondering if anyone else has experienced this. Also, if anyone has the WIS / Manual...can you tell me if the throttle assembly does indeed have a spring in it...if so...where? At the throttle body end?

I'm wondering if I should attempt to swap out the spring for one that isnt as stiff...or is there someway to adjust the "stiffness"?

Any help appreciated.

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 03-20-2007, 02:29 AM
BenzWorld Member
 
Date registered: Aug 2006
Vehicle: Vito 112 CDi year:2001
Location: UK
Posts: 303
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
On vito's the accelerator pedal is fly by wire - there's no mechanical cable instead there's a few electrical wires coming out of the pedal. Have a look at the pedal in the footwell. You may have to take off the footwell dash cover to get a better look. The return spring will be attached to the pedal.

To me it sounds like the clutch is the problem though.
4xpaws is offline  
post #3 of 10 (permalink) Old 03-20-2007, 04:48 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
I'll take a look and see if I can spy that spring in the throttle pedal...I figured as much as I didnt think a benzo would have a lo-tech throttle cable as such.

I dont think its the clutch. The clutch action (pedal) is a bit heavy...but not unusually. (I've owned 80' vettes...now those were HEAVY)

If I'm in 3rd gear or higher and give it the berries...I dont get any engine spin up...so the clutch I think is intact and not on its way out.

But the throttle pedal...as compared to my Ford Cmax for example...if very very stiff when I get past the free play and to the point where the throttle actually has input. The first portion of the throttle pedal travel from that point dowards is very stiff and requires a firm push with the foot.

This firm push is what makes it difficult to modulate.

In comparison, my Ford has a very progessive, smooth, light throttle pedal. So I can modulate the exact amount of gas I wanna give via my right foot. With the benz...I can modulate it if I take 100 years and go really really slow to find the right amount of input...which isnt very practical in city traffic.

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 03-20-2007, 04:48 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
What I'm really wondering is if anyone else has noticed this or is it just me being a ponce?

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
post #5 of 10 (permalink) Old 03-20-2007, 05:03 AM
BenzWorld Member
 
Date registered: Oct 2006
Posts: 311
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
ziras, since yours is an older V class, perhaps check if it is indeed a fly-by wire system.4xpaws 112 will be fly by wire but a 1997 model like yours could well be "normal" - have u had a gander under the hood?
rufus is offline  
post #6 of 10 (permalink) Old 03-20-2007, 03:33 PM
BenzWorld Junior Member
 
Date registered: Aug 2006
Posts: 31
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Ziras, you are dead right, i've got a 98 v-class, normal throttle (ie, cable) and mine is exactly the same, i've just learned to live with it though. I would like to fix it though as when my missus is driving she nearly gives me whiplash off the lights. (or wakes me up if i'm asleep.
psmith is offline  
post #7 of 10 (permalink) Old 03-21-2007, 12:38 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
Coolio...at least I can comfort myself in the knowledge it aint just me. Must be a German thing cause I hate my father-in-laws Opel...it has the same stiff throttle.

Anyone have a WIS screen dump of the throttle cable/spring? Its dark by the time I get home from work...so I'll have to wait for the weekend to poke around and see for myself if I have a cable/spring setup.

Finding the right spring rate is gonna be fun.

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
post #8 of 10 (permalink) Old 03-21-2007, 03:52 AM
BenzWorld Member
 
montymole's Avatar
 
Date registered: Feb 2005
Vehicle: V 220 CDI Trend
Location: Bern, CH
Posts: 123
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I had a similar problem with mine when I got it, it was the throttle cable was being pinched in the bonnet as it closed. I ended noticing it when I had the bonnet open and it wasn't doing it ...

Just re-routed the cable and re-clipped it in a neater run, not a problem since ... might not be the same but it is a cheap fix if it is !
montymole is offline  
post #9 of 10 (permalink) Old 04-17-2007, 03:02 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
I can see the culrpit...the throttle return spring is. (I'll take a pic and post over the weekend)

The throttle cable on my 97 V230 runs from the firewall, alongside the engine block on the driver side...then traverses the motor across the front of the block...then reverses itself towards the throttle body where there is a larg'ish return spring mounted to the side of the throttle housing which governs the modulation/return of the throttle cable.

Cable itself seems lubed up. If I move the throttle manually by hand, I can feel that spring is a bit tight. I might try to see if I can get a spare...then take the original and maybe cut some length off the spring? Think that may loosen it up?

Or just see if I can get a lighter-weight spring.

Keep ya posted.

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
post #10 of 10 (permalink) Old 04-17-2007, 03:02 AM Thread Starter
BenzWorld Junior Member
 
ziras's Avatar
 
Date registered: Feb 2007
Vehicle: 1997 V230 Silver
Location: SE
Posts: 42
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via Skype™ to ziras
(Thread Starter)
I can see the culrpit...the throttle return spring is. (I'll take a pic and post over the weekend)

The throttle cable on my 97 V230 runs from the firewall, alongside the engine block on the driver side...then traverses the motor across the front of the block...then reverses itself towards the throttle body where there is a larg'ish return spring mounted to the side of the throttle housing which governs the modulation/return of the throttle cable.

Cable itself seems lubed up. If I move the throttle manually by hand, I can feel that spring is a bit tight. I might try to see if I can get a spare...then take the original and maybe cut some length off the spring? Think that may loosen it up?

Or just see if I can get a lighter-weight spring.

Keep ya posted.

Z

-------------------------------------
1997 V230 Silver
Sweet but missing cruise & air...but dual sunroofs!
Clean, a little rust...but runs sweet. Will be nice by the time I'm done.
6 Seater vacation car and trackday bus for my ZXR750M/900 and family!

Born NYC, live in SE, work in DK.
ziras is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > Mercedes-Benz Vans/Trucks/SUV/Others > V-Class

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Topic Author Forum Replies Last Post
Throttle Response question Jayare W124 E,CE,D,TD Class 0 03-09-2006 06:05 AM
Really lazy throttle response... ewalberg G-Class 8 06-07-2005 07:40 AM
Crap! No response from throttle! Brian_R170 R170 SLK-Class 8 10-30-2004 05:36 AM
Slow throttle response Tom R170 SLK-Class 6 02-22-2001 01:14 PM
C class throttle response Guest (MBNZ) W202 C-Class 2 11-16-2000 03:03 PM

Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome