TB failure???
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MBWorld Fanatic!
Joined: Feb 2009
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From: Central WI (BFE)
SL55, ML500 & Acura TL
TB failure???
Has anyone heard of a throttle body failing? My SL55 is at the dealership now and they are telling me my 80mm TB (not stock, but made by AMG) has failed. They also say the engine has two throttles and either or both could be bad. Help please.
I took on a load of Shell 93 and a bottle of techron and rolled out onto the freeway not a 10th of a mile from the gas station. I dialed on a bit of power. The car accelerated as normal and then nothing. The throttle response was gone. I had a CEL and ESP go to shop warning. I restarted the car. It fired right up but idle was horrible, surging RPM from 700 to 1,500. Tried a few more times then towed to the dealer. The dealer says its either one or both throttles. I did not know I had two of them. Not sure if the techron thing is just a coincidence or not.
I took on a load of Shell 93 and a bottle of techron and rolled out onto the freeway not a 10th of a mile from the gas station. I dialed on a bit of power. The car accelerated as normal and then nothing. The throttle response was gone. I had a CEL and ESP go to shop warning. I restarted the car. It fired right up but idle was horrible, surging RPM from 700 to 1,500. Tried a few more times then towed to the dealer. The dealer says its either one or both throttles. I did not know I had two of them. Not sure if the techron thing is just a coincidence or not.
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shrimp boat
The second tb is the boost by pass valve. It seats right below the hard aluminum y pipe. When the car in boost it closes, when the car off boost it should be open. I don't think the second tb have anything to do with your car problem. The problem is in the main tb. Sound like some loose wires in your tb kit. Just jiggle the tb connector see if that help. Good luck.
Super Member
Joined: Oct 2009
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From: Saudi Arabia - Qatif
Brabus K8 E55 05
Have they tried to recalibrate the TB? I had strange problem and my mechanic could fix it luckly. The TB stopped feeding the car when I step on the gas for some reason. There is procedure in Star to calibrate the TB, Mine is TTM 82 TB, but I would assume it will work for all. Just give it a try you will not lose anything.
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Joined: Mar 2009
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From: Alpharetta Georgia
2006 E55, 2006 saab 93 aero, 2010 glk 4m
As stated check the wires (individually going into the tb. There is some trick to re-adapt it.
I believe unplug the tb, plug it back in.
Turn the key to the run position (just before the crank position). The blade will move a few times but keep the key in this position for 3-4 minutes where it will move again by itself and then start the car.
I believe unplug the tb, plug it back in.
Turn the key to the run position (just before the crank position). The blade will move a few times but keep the key in this position for 3-4 minutes where it will move again by itself and then start the car.
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Joined: Jan 2008
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From: UK
E55K AMG
The second tb is the boost by pass valve. It seats right below the hard aluminum y pipe. When the car in boost it closes, when the car off boost it should be open. I don't think the second tb have anything to do with your car problem. The problem is in the main tb. Sound like some loose wires in your tb kit. Just jiggle the tb connector see if that help. Good luck.
The plug to the TB was not always making a proper connection on mine, the pins are very small.
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Thread Starter
MBWorld Fanatic!
Joined: Feb 2009
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From: Central WI (BFE)
SL55, ML500 & Acura TL
So the Techs at the dealership are concerned that they will affect the tune if they recalibrate the TB. I don't see how. They should be able to try everything listed above without affecting the tune in any way correct?
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shrimp boat
Thread Starter
MBWorld Fanatic!
Joined: Feb 2009
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From: Central WI (BFE)
SL55, ML500 & Acura TL
Thanks Chad and everyone for the help.
Yep the TB ate a gasket. I had tons of trouble convincing the techs that just because the TB wasn't stock (AMG 80) didn't mean they could not touch it. They thought the ECU was going to somehow reflash itself back to stock if they unplugged the TB. Finally they removed the "Y" pipe and saw the problem. I guess they were being extra cautious. They were willing to sell me a whole new TB and boost throttle though. I wonder what that would have cost plus install.
Thanks again for all of the help
Yep the TB ate a gasket. I had tons of trouble convincing the techs that just because the TB wasn't stock (AMG 80) didn't mean they could not touch it. They thought the ECU was going to somehow reflash itself back to stock if they unplugged the TB. Finally they removed the "Y" pipe and saw the problem. I guess they were being extra cautious. They were willing to sell me a whole new TB and boost throttle though. I wonder what that would have cost plus install.
Thanks again for all of the help
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2005 E55
HAHA I knew it was the gasket.I was racing an M5 and went wot with my 82 tb and once I left off the throttle the car went crazzy.The dash said D 4 when I was in M 3 and the ecu went nuts and I threw the car in N and coasted off the highway with the engine surging like yours did.
I pulled over and yanked the intake apart and saw the gaske sticking out with the TB jammed wide open.Yanked it out and reset ecu and off I went to work.
I actually mad a warning thread about it for people running bigger tbs
I pulled over and yanked the intake apart and saw the gaske sticking out with the TB jammed wide open.Yanked it out and reset ecu and off I went to work.
I actually mad a warning thread about it for people running bigger tbs
Last edited by skratch77; Apr 12, 2011 at 03:37 PM.
