No power and engine stumble at WOT???
03-16-2016 | 10:26 PM
#1
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 38
Likes: 0
2004 E55 AMG
No power and engine stumble at WOT???
Car:
2004 E55 AMG.
Let me first say that I have been reading older threads on here, and I cannot find anyone describing the sensation I have of the engine bucking when it goes WOT.
Also you should know that I replaced both the heat exchanger with a larger unit from Shardul, and the h/e pump with a new Bosch 010 last year. I have not driven the car very much since then due to other problems, but everything seemed to be fine during recent driving.
The other problem was a throttle body. Car was down for a while, but ran fine after I installed a new throttle body, (supercharger seemed to be working properly) up until last Sunday.
On Sunday I ran the car pretty hard (just spirited street driving) for an hour or so, and then parked it. When I came back to drive it, the car would start, idle, and run part throttle just fine. However, as soon as I press the gas pedal to the floor and engage the switch under the pedal that usually makes things exciting the engine revs up, but I don't feel much acceleration, it feels as though the supercharger is not working due to the extreme lack of power, and then I get a surging and bucking sensation from the engine(?) which I find somewhat scary. It kind of feels like someone is applying the brakes while the engine is trying to go WOT.
Any suggestions?
Also, I have STAR, but am a newby when it comes to using it. I would be happy to scan for anything as directed by someone who knows what to do.
Thank you for any help you may provide. I appreciate your time!
2004 E55 AMG.
Let me first say that I have been reading older threads on here, and I cannot find anyone describing the sensation I have of the engine bucking when it goes WOT.
Also you should know that I replaced both the heat exchanger with a larger unit from Shardul, and the h/e pump with a new Bosch 010 last year. I have not driven the car very much since then due to other problems, but everything seemed to be fine during recent driving.
The other problem was a throttle body. Car was down for a while, but ran fine after I installed a new throttle body, (supercharger seemed to be working properly) up until last Sunday.
On Sunday I ran the car pretty hard (just spirited street driving) for an hour or so, and then parked it. When I came back to drive it, the car would start, idle, and run part throttle just fine. However, as soon as I press the gas pedal to the floor and engage the switch under the pedal that usually makes things exciting the engine revs up, but I don't feel much acceleration, it feels as though the supercharger is not working due to the extreme lack of power, and then I get a surging and bucking sensation from the engine(?) which I find somewhat scary. It kind of feels like someone is applying the brakes while the engine is trying to go WOT.
Any suggestions?
Also, I have STAR, but am a newby when it comes to using it. I would be happy to scan for anything as directed by someone who knows what to do.
Thank you for any help you may provide. I appreciate your time!
03-22-2016 | 08:49 PM
#6
MBWorld Fanatic!
Joined: Dec 2011
Posts: 1,226
Likes: 23
Mercedes
Probably transmission fluid wicked it way up into the TCU and damaged it. Thankfully it's a simple fix for the TCU, just get another one from an E55 and it'll plug and play no programming needed.
You will need to fix the leaking transmission.
Search for how to remove TCU, pull the TCU and see if it's wet anywhere on or around it.
You will need to fix the leaking transmission.
Search for how to remove TCU, pull the TCU and see if it's wet anywhere on or around it.
03-22-2016 | 10:00 PM
#7
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 38
Likes: 0
2004 E55 AMG
Probably transmission fluid wicked it way up into the TCU and damaged it. Thankfully it's a simple fix for the TCU, just get another one from an E55 and it'll plug and play no programming needed.
You will need to fix the leaking transmission.
Search for how to remove TCU, pull the TCU and see if it's wet anywhere on or around it.
You will need to fix the leaking transmission.
Search for how to remove TCU, pull the TCU and see if it's wet anywhere on or around it.
