2011 E350 stumbles bad at low Rpm
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2011 Mercedes-Benz E350 4matic
2011 E350 stumbles bad at low Rpm
No engine lites or codes , ideas rough, stumbles Hesitates bad During acceleration , I have to have my foot in it Pretty good just to get out of my own way. New air filters new spark plugs. Clean mass airflow sensor . Car just hit 100,000 has been acting like this and getting progressively worse for the past 5000 miles . Always use 93 gas , And have ran a few bottles of tech Tron fuel system cleaner . Help ! Please!
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2011 Mercedes-Benz E350 4matic
The motor doesn’t seem to be moving around too much I’ve had bad motor mounts in previous cars and I don’t feel any of those symptoms. What would that have to do with the hesitation and stumbling during acceleration? Thanks
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From: San Diego, CA
2016 E350 Sport; Mom Wrecked the 2008 E350; sold the 2002 C320
I'd suspect the MAF, the crank position sensor or the throttle body but best to get a STAR diagnostic done.
I had this happen once on my W211 after cleaning the throttle body & developed hard starts & stumbles that got progressively worse but no check engine. After throwing several parts at it to no avail, got it diagnosed and had to replace the throttle body
I had this happen once on my W211 after cleaning the throttle body & developed hard starts & stumbles that got progressively worse but no check engine. After throwing several parts at it to no avail, got it diagnosed and had to replace the throttle body
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From: San Diego, CA
2016 E350 Sport; Mom Wrecked the 2008 E350; sold the 2002 C320
IIRC, it was somewhere between 1500-1800 all said and done
You can get the throttle body much cheaper online than at the dealer but it has to get programmed and in my case, they wouldn't do it if I sourced the TB elsewhere
You can get the throttle body much cheaper online than at the dealer but it has to get programmed and in my case, they wouldn't do it if I sourced the TB elsewhere
Last edited by EuroDriverSD; Feb 11, 2020 at 05:13 PM.
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2011 Mercedes-Benz E350 4matic
Well that answered my next question because I planned to fix it myself but I assume it would have to be programmed . How much did just the diagnosis run you? And would you say the diagnosis would be how accurate? Thanks .
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From: San Diego, CA
2016 E350 Sport; Mom Wrecked the 2008 E350; sold the 2002 C320
An officialSTAR/Xentry diagnosis should run you between $100-150 and they are as good as it gets. A lot of things can't be diagnosed with universal scanners
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From: Sammamish, WA
2011 E350 Wagon, 2010 GL450
It would be worthwhile to get a generic scan from a parts store, just as a quick and easy check, no? If it shows something like "misfire on cylinder x" then you can look at that cylinder's plug, coil, wires, etc. just to rule the easy stuff out. If you still run into a brick wall, agreed, get a proper diagnosis.
Give all of the hoses connected to the intake a careful look over and make sure none are cracked or torn. Make sure the electrical connections going to things like the ignition coils and MAF are secure. Simple stuff, I know, but so many times it's something simple.
Give all of the hoses connected to the intake a careful look over and make sure none are cracked or torn. Make sure the electrical connections going to things like the ignition coils and MAF are secure. Simple stuff, I know, but so many times it's something simple.
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From: San Diego, CA
2016 E350 Sport; Mom Wrecked the 2008 E350; sold the 2002 C320
It would be worthwhile to get a generic scan from a parts store, just as a quick and easy check, no? If it shows something like "misfire on cylinder x" then you can look at that cylinder's plug, coil, wires, etc. just to rule the easy stuff out. If you still run into a brick wall, agreed, get a proper diagnosis.
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2011 Mercedes-Benz E350 4matic
I have checked everything obvious originally I had a check engine light ,a misfire I swapped coils around and change spark plugs to see if the misfire moved Cylinders. But the scan tool was no longer reading a misfire or any engine codes I have no check engine light ! The light went away problem used to go away after car was driven for 10 to 15 minutes. But now is there always at low RPM Struggling and hesitating. But does not seem to stumble when I have my foot hard on the throttle. . I was thinking maybe one of the fuel pumps . But still at this point I am looking for suggestions thanks
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From: San Diego, CA
2016 E350 Sport; Mom Wrecked the 2008 E350; sold the 2002 C320
These cars have very complicated electronics systems. We can make you feel good and give you guesses as to what the problem may be but the most likely result is that you will throw money at it with no relief. No one or nothing can give you a more accurate answer than a proper diagnosis.
Stop beating your head against a wall and get a STAR/Xentry diagnostic - you'll be amazed at what a thorough and detailed examination it does. My local shop waives the diagnostic fee if I have them perform the repairs; maybe you could ask yours to do the same.
Stop beating your head against a wall and get a STAR/Xentry diagnostic - you'll be amazed at what a thorough and detailed examination it does. My local shop waives the diagnostic fee if I have them perform the repairs; maybe you could ask yours to do the same.
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2011 Mercedes-Benz E350 4matic
Thank you yes at this point I agree that’s what it’s all leading back to ,I am looking into a place that can perform that for me . Not sure if it would be more effective if I got it done at a Mercedes dealer seeing how they obviously work on them consistently ,or if most any shop with the technology can perform it .? Thanks
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
stumblin' hard
I'd suspect the MAF, the crank position sensor or the throttle body but best to get a STAR diagnostic done.
I had this happen once on my W211 after cleaning the throttle body & developed hard starts & stumbles that got progressively worse but no check engine. After throwing several parts at it to no avail, got it diagnosed and had to replace the throttle body
I had this happen once on my W211 after cleaning the throttle body & developed hard starts & stumbles that got progressively worse but no check engine. After throwing several parts at it to no avail, got it diagnosed and had to replace the throttle body
Post #1: starts with the MAF being out of question!
Assuming there are not CEL or related DTC to help speed up diagnostic:
This problem is when you can get $4k worth of repairs with nothing but an ECU reset + air filter ....
It's stumbling because of a seriously wrong mixture. It probably started with throttle lag and engine vibrations.
What maintenance items have been done vs. skipped over ?
>> Catch up with the basic maintenance items first then test for additional needs...
Can you see positive Fuel Trims indicating a lean engine with unmetered air:
- Camshaft rear covers
- PCV track
- Intake plenum seals ?
- Phasers?
-
I am not a fan of the bad "throttle body"... ECU scrutinize the plate feedback with top priority and triggers limp modes reliably.
> Can failed intake VVT phasers help produce that when they are rattling loose ?
Last edited by CaliBenzDriver; Jan 13, 2022 at 04:31 PM.
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From: MA
2008 E350 4Matic, 2011 E350 4matic
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From: Murfreesboro, TN
2011 ML350 4matic W166
[QUOTE=RY zeek;7978168]
No engine lites or codes , ideas rough, stumbles Hesitates bad During acceleration , I have to have my foot in it Pretty good just to get out of my own way. New air filters new spark plugs. Clean mass airflow sensor . Car just hit 100,000 has been acting like this and getting progressively worse for the past 5000 miles . Always use 93 gas , And have ran a few bottles of tech Tron fuel system cleaner . Help ! Please!
.I'm going to follow this because I have the SAME exact problem goin on. I even changed the MAF sensor after the problem didn't resolve after cleaning it. Have you figured anything out. It is so incredibly frustrating!
.I'm going to follow this because I have the SAME exact problem goin on. I even changed the MAF sensor after the problem didn't resolve after cleaning it. Have you figured anything out. It is so incredibly frustrating!
Last edited by MgnML; Mar 9, 2024 at 09:31 PM. Reason: Wrote in the wrong spot.
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
bad old fuel filter
Stumbling hard... what can the fuel supply tell us:
The longterm fuel trim number... highly positive?
The fuel pressure during acceleration... falling down ??
New in-tank filterelse
The longterm fuel trim number... highly positive?
The fuel pressure during acceleration... falling down ??
New in-tank filter
