C32 AMG, C55 AMG (W203) 2001 - 2007

IC Pump or SC going bad?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Aug 18, 2009 | 11:39 PM
  #1  
C32AMGSC's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2008
Posts: 353
Likes: 0
From: Middle TN
03 C32 AMG
IC Pump or SC going bad?

Been having problems lately with my C32. Check Engine light is on. I had the IC pump replaced 2 years ago by Eric from LET Motorsports with a Johnson CM30. He did the install himself. Lately when I accelerate coming from a complete stop my car barely creeps up. Can be really dangerous especially during making a turn on an intersection. Can someone please verify what I need to do to fix this? Is this an IC pump failure, a SC failure or something else?

By the way the car also drives fine when I'm on the highway driving at atleast 65 mph once I get it going, just whenever I'm accelerating coming from a stop or from a slow down that's when I feel it the most.


I also noticed sometimes it works just fine. Also FYI, I have a sprintbooster installed so I don't know if that's causing some of my problems/frustration that I am having?

Your input is appreciated.

Last edited by C32AMGSC; Aug 18, 2009 at 11:48 PM.
Reply
Old Aug 18, 2009 | 11:56 PM
  #2  
ML500K's Avatar
Senior Member
 
Joined: Dec 2008
Posts: 343
Likes: 3
From: Taipei, Taiwan
C32 '02
i would suspect that it might be a fuel pump failure. I've had that issue when trying to start from a dead stop. Have ur mechanic do a fuel pressure test. It should be about 50-60 psi at idle. But u also have a CEL, so that might be another issue. Lower fuel pressure or failing fuel pump usually won't cause a CEL.

cheers~

Last edited by ML500K; Aug 19, 2009 at 12:02 AM.
Reply
Old Aug 19, 2009 | 12:06 AM
  #3  
FrankW's Avatar
MBworld Guru
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
have the error code checked.

it could be your throttle position sensor.
Reply
Old Aug 19, 2009 | 12:09 AM
  #4  
C32AMGSC's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2008
Posts: 353
Likes: 0
From: Middle TN
03 C32 AMG
Frank, I think you are right. I borrowed an OBD from a buddy from work and it's showing P0121 which showing a throttle response error.


How to fix this and how much?
Reply
Old Aug 19, 2009 | 12:11 AM
  #5  
FrankW's Avatar
MBworld Guru
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
Originally Posted by C32AMGSC
Frank, I think you are right. I borrowed an OBD from a buddy from work and it's showing P0121 which showing a throttle response error.


How to fix this and how much?
dealer sells them as the entire pedal assembly probably around $130-150? it's the thing your sprintbooster plugs into. lol
Reply
Old Aug 19, 2009 | 12:20 AM
  #6  
TemjinX2's Avatar
MBWorld Fanatic!
 
Joined: Dec 2007
Posts: 5,034
Likes: 6
From: Corona, CA
03 g35 coupe...........02 c32 Sold
yeah i had a similar problem but my symptoms were way worst. i'm waiting for my pedal asssembly in the mail..i'll give a update in my other thread when i get it.
Reply
Old Aug 19, 2009 | 12:22 AM
  #7  
C32AMGSC's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2008
Posts: 353
Likes: 0
From: Middle TN
03 C32 AMG
Ok, I will try to take out the sprintbooster and see how my car respond. Dang thing is gimmicky if you ask me.

If the problem is still happening I'll go with the new pedal assembly. Which is about the same price as the Sprintbooster!
Reply
Old Aug 19, 2009 | 12:24 AM
  #8  
C32AMGSC's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2008
Posts: 353
Likes: 0
From: Middle TN
03 C32 AMG
Originally Posted by TemjinX2
yeah i had a similar problem but my symptoms were way worst. i'm waiting for my pedal asssembly in the mail..i'll give a update in my other thread when i get it.
Where did you order the pedal assembly from? How much? What's the part code #?
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

 Verdad Gallardo
story-1

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-2

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-3

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-4

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-5

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-6

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-7

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-8

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-9

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
Old Aug 19, 2009 | 12:32 AM
  #9  
FrankW's Avatar
MBworld Guru
20 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Apr 2002
Posts: 22,058
Likes: 18
From: Diamond Bar, CA
W206 PHEV AMG
Originally Posted by C32AMGSC
Ok, I will try to take out the sprintbooster and see how my car respond. Dang thing is gimmicky if you ask me.

If the problem is still happening I'll go with the new pedal assembly. Which is about the same price as the Sprintbooster!
sprintbooster just tells the throttle to open bigger that's all it does. you can just do it with a heavier foot with the same result. lol

I rather pay the same for a nice pair of Prada (or better, multiple pairs of PUMAs)to stump on the gas pedal instead.
Reply
Old Aug 19, 2009 | 12:41 AM
  #10  
C32AMGSC's Avatar
Thread Starter
Senior Member
 
Joined: Jul 2008
Posts: 353
Likes: 0
From: Middle TN
03 C32 AMG
Originally Posted by FrankW
sprintbooster just tells the throttle to open bigger that's all it does. you can just do it with a heavier foot with the same result. lol

I rather pay the same for a nice pair of Prada (or better, multiple pairs of PUMAs)to stump on the gas pedal instead.

Sad part Frank is that I'm actually a pretty big guy (6'0 240 lbs. former linebacker) and have a heavy foot. If I knew more about Sprintbooster and not fall for the gimmick I wouldn't have this problem...Lesson learned indeed.
Reply
Old Aug 19, 2009 | 12:42 AM
  #11  
TemjinX2's Avatar
MBWorld Fanatic!
 
Joined: Dec 2007
Posts: 5,034
Likes: 6
From: Corona, CA
03 g35 coupe...........02 c32 Sold
Originally Posted by C32AMGSC
Where did you order the pedal assembly from? How much? What's the part code #?
i got it from parts.com

i PMed you the link i posted with the part numbers.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 05:48 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE