Weird problem on every morning
Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
Weird problem on every morning
Hello All,
Everyday in the morning, I switch the Engine on and put the gear in drive. Once the car starts moving and reaches the 2000 RPM, it drops to 1000 RPM immediately, as if I took my leg off the throttle pedal.
This happens only the 2nd gear or 3rd (Car is always on "C" mode). Once the car is driven/warmed for 5-10 mins it never happens.
I've done a quick test through Star SDS, it showed that the "B28" Pressure sensor is stored (Code: P2007-008).
Removed the sensor (A004 153 33 28), replaced it with the new one which is (A006 153 98 28). However, the problem still exists.
At this moment I don't really know what is cause of the problem. Hope you guys help me sort it out.
Thanks
Everyday in the morning, I switch the Engine on and put the gear in drive. Once the car starts moving and reaches the 2000 RPM, it drops to 1000 RPM immediately, as if I took my leg off the throttle pedal.
This happens only the 2nd gear or 3rd (Car is always on "C" mode). Once the car is driven/warmed for 5-10 mins it never happens.
I've done a quick test through Star SDS, it showed that the "B28" Pressure sensor is stored (Code: P2007-008).
Removed the sensor (A004 153 33 28), replaced it with the new one which is (A006 153 98 28). However, the problem still exists.
At this moment I don't really know what is cause of the problem. Hope you guys help me sort it out.
Thanks
Last edited by mAMG; Feb 12, 2019 at 01:32 PM.
Senior Member
Joined: Oct 2014
Posts: 254
Likes: 34
From: Oregon
2006 ML350, 2005 C55, 2004 E55
It sounds like you're describing the TCC solenoid issue. When the car is cold it starts out in 1st gear even in C mode, the TCC solenoid engages abruptly and only when cold. Once warmed up this goes away.
https://mbworld.org/forums/c32-amg-c...em-solved.html
https://mbworld.org/forums/c32-amg-c...em-solved.html
Last edited by Fantomas; Feb 13, 2019 at 08:03 PM.
Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
It sounds like you're describing the TCC solenoid issue. When the car is cold it starts out in 1st gear even in C mode, the TCC solenoid engages abruptly and only when cold. Once warmed up this goes away.
https://mbworld.org/forums/c32-amg-c...em-solved.html
https://mbworld.org/forums/c32-amg-c...em-solved.html
Is it fine if I drive the car like that for a while ?
The thing is, its just a matter of weeks and the temperatures here is going to skyrocket again, so the issue won't be happening.
Member
Joined: Nov 2017
Posts: 198
Likes: 20
2008 BMW M5, 2004 E55 AMG (RIP)
Yes you should be fine to drive it like that for the time being, I doubt it’s putting that much extra (if any) strain on the tc. I have the same issue that started when the temperatures dropped a lot back in early January and haven’t replaced it yet, though mine doesn’t drop as many rpm as yours.
MBWorld Fanatic!
Joined: Aug 2012
Posts: 1,790
Likes: 109
From: DownEast Maine
CLS 55 AMG E500 ML320
I read through that thread up into the 70's and one thing I didn't see... shouldn't a new conductor plate come with all the solenoids? I didn't realize you had to, or could replace them separately.
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
Solenoids are all separate, the conductor plate is just what supplies them with power. Solenoid failure is rare, especially shift solenoids, but for about $60 the TCC solenoid is a no brainer while you're in there.
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Thread Starter
Member
Joined: Mar 2013
Posts: 225
Likes: 8
SL55 2003
Well, I believe i got the infamous hiccup issue that usually happens on larger throttle bodies, although my car is stock.
It usually happens after a highway drive, once I slow down, the car starts to shake/surges.
Works fine after a restart ...
It usually happens after a highway drive, once I slow down, the car starts to shake/surges.
Works fine after a restart ...
Super Member
Joined: Aug 2018
Posts: 697
Likes: 172
From: Seattle, WA
2019 M5 Comp, 2005 Ariel Atom 2
I'd check all vacuum connectors near the back of the supercharger, especially since you probably had some stretched to get to that darn MAP sensor (ask me how I know).
There's the brake booster plug/plunger and then a metal pipe underneath that, both on the drivers side, that are prone to leaks as well.
My hiccup has remained but I finally got a code for the bypass actuator motor, which greatly explains a loss in power between shifts and at random times when it should be closed but isn't.
Just pulled the supercharger tonight, what a chore, hopefully back together soon...
There's the brake booster plug/plunger and then a metal pipe underneath that, both on the drivers side, that are prone to leaks as well.
My hiccup has remained but I finally got a code for the bypass actuator motor, which greatly explains a loss in power between shifts and at random times when it should be closed but isn't.
Just pulled the supercharger tonight, what a chore, hopefully back together soon...
Member
Joined: Nov 2017
Posts: 198
Likes: 20
2008 BMW M5, 2004 E55 AMG (RIP)
I'd check all vacuum connectors near the back of the supercharger, especially since you probably had some stretched to get to that darn MAP sensor (ask me how I know).
There's the brake booster plug/plunger and then a metal pipe underneath that, both on the drivers side, that are prone to leaks as well.
My hiccup has remained but I finally got a code for the bypass actuator motor, which greatly explains a loss in power between shifts and at random times when it should be closed but isn't.
Just pulled the supercharger tonight, what a chore, hopefully back together soon...
There's the brake booster plug/plunger and then a metal pipe underneath that, both on the drivers side, that are prone to leaks as well.
My hiccup has remained but I finally got a code for the bypass actuator motor, which greatly explains a loss in power between shifts and at random times when it should be closed but isn't.
Just pulled the supercharger tonight, what a chore, hopefully back together soon...
