Alldayman,
You wrote:
"2014 2500 2.143 liter 4 cylinder OM-651/7G-Tronic 7 speed transmission.
50,000 miles on odometer.
High Top 2nd owner well kept.
Well kept?
You have all the past invoices that this vehicle has had an "A" service @ 15,000 miles, a "B" service (including the fuel filter) @ 30,000 miles and the 2nd "A" service @ 45,000 miles, performed at an authorized Mercedes Benz Sprinter dealer in the Sprinter specific/commercial shop, using genuine Mercedes Benz Sprinter replacement parts and the currently approved low SAPS 0w-30 or 5w-30 Genuine Mercedes Benz motor oil and all other service products are approved on the 2014 BEVO list?
If not, then "well kept" does not mean much.
Call me crazy but I think this ones going to drive me there or I'll just trade it in unless someone has had the same issue out here that might have some insight.
Your engine "stalling" could be caused by a myriad of things, but until you take it to a Mercedes Benz Dealer, for a full diagnostic test + live data screen to ensure that all the emissions devices and sensors are functioning correctly, you really have nothing to lead you to what the problem really is.
I have had it stall on me now several times at an idle.
My identical specification 2014 Sprinter currently has 220,000 miles and it has never stalled once.
Do you shift out of drive at signal lights to limit the amount of engine load when idling?
Do you turn your engine off when at a signal controlled intersection where you know the wait is going to be longer than a minute or 2?
Turn off turn on ok but feels like something still not quite right, when it stalls just before I feel it stumble watch the rpm gauge drop a little then it dies.
The idle speed (RPM) will be 760 RPM and should not vary more than 5 RPM higher or lower.
What is your Sprinter's idle RPM and how many RPM does it vary?
I have replaced the fuel filter twice in the time I've owned it, no codes no other problems but today I felt it stumble in the same area it did it before, same time of day hot and running.
Why do you continue to change the fuel filter?
Unless you knowingly use very low quality/dirty/water laden/ unfiltered ULSD there is no reason to change the fuel filter at < every 30,000 miles (every "B" service if you follow the recommended 15,000 mile service intervals).
Unfiltered diesel fuel is pretty hard to find these days. Virtually all diesel pumps have some sort of filter on the output from the pump.
I've noticed it is very windy in this area and I'm wondering if this is bringing this on meaning some kind of pressure sensing, manifold ect.
Very unlikely that the ambient atmospheric pressure or wind speed is causing your stalling issues. Also very unlikely that the "air wake" from
passing trucks is causing your engine to stall.
I do have a new air filter, so I'm sitting there in traffic wondering about this and a big truck blows by me while I'm waiting to turn and the van gets sucked over right to left pretty hard and blamo it stalls so now I'm also thinking is there something related to the stabilization stuff it has involved with this.
My Sprinter rocks just like yours, when sitting in a left hand turn lane with lots of traffic whoosing by in the next lane @ 45+ mph.
But my Sprinter just rocks a bit, sitting there idling, in neutral, or sitting there completely shut off for long duration signals.
Probably a good idea for you to take your Sprinter to an authorized Mercedes Benz Sprinter dealer, tell them that it's stalling and
let them run their full diagnostics.
They will run the diagnostics and make some recommendations based on the diagnostics as to what the cause of your stalling
actually is.
You could have an out of specification sensor in one the emissions devices (covered by the 100k emissions warranty if you transferred it from the 1st owner).
Until you have the results of a full dealer level (or high end Sprinter specialist shop) diagnostic scan, you can continue to throw
parts at your Sprinter, but that will only fix the stalling issue when you replace the actual sensor or device that's causing the
problem. The sensors are expensive, and without the dealer level scan to determine which one is causing your error, you can
replace a whole bunch of sensors/devices, and still have the stalling problem.
The diagnostic scan will most likely identify which sensor or device is out of spec and your problem will be solved when that
specific sensor/device is replaced with a genuine Mercedes Benz replacement part (which will automatically have bee upgraded
to the latest revision if there have been issues with the device/sensor.
Hope this helps,
Roger