105mm TB ISSUES
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 18
Likes: 2
S550 E500 E350
105mm TB ISSUES
So, over the winter I decided to rebuild the supercharger with new bearings, seals etc. The forever "while you're in there" got me and I got the blower ported and installed VRP's billet surge tanks and 105mm TB kit. Since then, I've been experiencing ESP malfunctions for engine CAN incorrect signals as well as codes in M.E. for idle speed control / potentiometer signal errors. The faults only seem to occur when I'm off throttle and it's idling down. No issues during acceleration in any gear.
I've reached out to VRP with no response so far and Granatelli called and never heard of their TB's going on a Mercedes like this. They're willing to swap to verify not a bad TB but I don't think it's the issue. Has anyone found a workaround for the newer 13+ hellcat throttle body with the brushless motor?
Any insight is greatly appreciated.
I've reached out to VRP with no response so far and Granatelli called and never heard of their TB's going on a Mercedes like this. They're willing to swap to verify not a bad TB but I don't think it's the issue. Has anyone found a workaround for the newer 13+ hellcat throttle body with the brushless motor?
Any insight is greatly appreciated.
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 18
Likes: 2
S550 E500 E350
I believe the issue is with the position sensors and how the brushless motor doesn’t have the resistance values to create the signals the m.e. wants to see.
I’ve double checked the stock and 82mm tb’s and they both work the same way 680-1480 ohms through the sweep and essentially inverted for other sensor. The brushless motor just sits at 80-84 ohms for both sensors no matter position.
My question is, is there anyway to make this work with the stock m.e.? Or am I switching to an old style BBK or Arrington with the oem brush motor?
To add to this, are there any other good tb options?
I’ve double checked the stock and 82mm tb’s and they both work the same way 680-1480 ohms through the sweep and essentially inverted for other sensor. The brushless motor just sits at 80-84 ohms for both sensors no matter position.
My question is, is there anyway to make this work with the stock m.e.? Or am I switching to an old style BBK or Arrington with the oem brush motor?
To add to this, are there any other good tb options?
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 18
Likes: 2
S550 E500 E350
Yes I’ve tried it through DAS, the key 2-1-unplug-2 let it actuate then start, and Granatelli says key 2 and actuate pedal to kickdown 5 times.
Sometimes car will run and drive with zero issues but then others it’ll act up 5 times in 5 miles. It always occurs when off throttle and has happened sitting still at a light and on decel while driving. During the fault my ndash logs show throttle position at 5 like at idle regardless of pedal position. Acc pedal sensors all sweep within values.
I made a new harness today using factory pins to rule out pin tension etc. and will monitor.
Sometimes car will run and drive with zero issues but then others it’ll act up 5 times in 5 miles. It always occurs when off throttle and has happened sitting still at a light and on decel while driving. During the fault my ndash logs show throttle position at 5 like at idle regardless of pedal position. Acc pedal sensors all sweep within values.
I made a new harness today using factory pins to rule out pin tension etc. and will monitor.
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 18
Likes: 2
S550 E500 E350
Update:
Malfunction still occurred with new harness and with a test file from Jerry at Eurocharged ( who’s service is awesome btw)
I finally broke down and bought a new factory mopar 92mm and have had zero issues so far.
Still on the 105mm tune and seems to be running a little leaner at times. Waiting on another update to help dial it in, but for now the 105 is going on the shelf until more promising results can be achieved.
Malfunction still occurred with new harness and with a test file from Jerry at Eurocharged ( who’s service is awesome btw)
I finally broke down and bought a new factory mopar 92mm and have had zero issues so far.
Still on the 105mm tune and seems to be running a little leaner at times. Waiting on another update to help dial it in, but for now the 105 is going on the shelf until more promising results can be achieved.
Trending Topics
Thread Starter
Junior Member
Joined: Sep 2018
Posts: 18
Likes: 2
S550 E500 E350
Yeah I just haven’t had the time. I’ve been trying to set something up with Tony, but he’s been unresponsive as of late. One day, maybe over the winter, I’ll have a dyno day and bring the 105 to test as well.
I didn’t want to test a possible bad used one so I just got a new factory mopar 92. I believe by magneto-marelli? It was like $300 and bolted up to the 105 snout with a thin bead of mb black sealant.
I didn’t want to test a possible bad used one so I just got a new factory mopar 92. I believe by magneto-marelli? It was like $300 and bolted up to the 105 snout with a thin bead of mb black sealant.
MB World Stories
The Best of Mercedes & AMG
New Mercedes-AMG SUVs Arrive With NEW V8 Engine: 12 Things You Need to Know
Verdad Gallardo
8 Oddball Mercedes Ideas That Actually Made it to Production
Verdad Gallardo
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look
Verdad Gallardo
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
MBWorld Fanatic!
Joined: May 2007
Posts: 1,793
Likes: 44
From: San Diego
2004 E55
MBWorld Fanatic!
Joined: Jul 2014
Posts: 3,347
Likes: 595
2005 e55 AMG
Are you on the stock blower?
Also there is two sensors the ECU is dealing with. One in the ECU itself that reads altitude which is a pressure type thingy and then the MAP sensor itself so between those two and the altered air flow at a different throttle blade opening from the larger throttle blade the ECU has a fit.....from what I have seen.
Also there is two sensors the ECU is dealing with. One in the ECU itself that reads altitude which is a pressure type thingy and then the MAP sensor itself so between those two and the altered air flow at a different throttle blade opening from the larger throttle blade the ECU has a fit.....from what I have seen.
Last edited by SICAMG; Jul 3, 2025 at 08:08 PM.
