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Old 08-19-2014, 08:49 AM
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MORE fuel injector issues (plus new conspiracy theory)

I will start by saying that our 2013 special ordered X5 5.0 MSport is hands down the worst car I have ever owned. I have owned 8 BMW's and currently own two others and this not up to BMW's standards. Dealing with BMWNA has been equally as frustrating. It is light years worse than the issues we experienced with the Supercharged Range Rover we traded in for it.


It has now been in for service SIX TIMES since March for an "engine malfunction warning". It has been in for other issues as well, but we will focus on the engine for now. Until this most recent trip to the dealer they would always change out a few (or all) injectors and send me on my way a day or two later. This past time I was sent on my way with a 750i loaner that we ended up having for 29 days due to an ongoing case with BMW where I asked to get my lease terminated to no avail. The 750i started exhibiting a lot of the same stuttering, jerking, and bucking symptoms at 800 miles on the odometer that our x5 has always dealt with. I have no doubt that the 750i is not far away form all the same fixes our X5 needed. Our car has 14,xxx miles on it.



When we got the car back from service last week, my wife and I both noticed after driving it separately and not discussing it ahead of time that the engine very clearly feels different from before. It feels like they dumbed down the tune on it and a lot of the torque seems to have gone missing. We do drive our "ultimate driving machine" fairly aggressively, but nothing out of the ordinary, so we both know how the car used to feel though out the powerband. Is it possible that a fix they have come up with for the 5.0's that are eating fuel injectors regularly is to adjust the output of the engine to a noticeable degree? It sounds the same as before, but feels like a struggling 6 cylinder to get the car moving. The seat of the pants torque feel from before seems absolutely different. At first I figured it was just that we didn't have the car for a month and that we just had not gotten re-accustomed to it, but I'm not so sure.



any thoughts on this?
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Old 08-19-2014, 11:24 AM
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Dyno it!
Or you can even do your own acceleration test using a phone app
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Old 08-19-2014, 12:48 PM
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Anything is possible.

That said, if I had ongoing fuel system problems and a loaner vehicle started exhibiting the same behaviour, I would look to my fuel supply. Do you frequent a short list of fuel stations?
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Old 08-19-2014, 01:11 PM
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I don't think that you can de-tune the engine to the extend that you describe, but it is possible to reprogram the shift points on the transmission, making the car "feel" entirely different ...

Ask for a print-out of the various work orders and make sure it includes all of the "codes". Share on this forum and we'll try to figure it out. Although I'm not certain that the dealer will comply with your request, citing "confidentiality of information", and that the legal owner of the car is BMWFS (lessor) and not you!

Also post this on Bimmerfest.com forum for feedback ...
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Old 08-19-2014, 06:45 PM
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Quote:
Originally Posted by JCL View Post
Anything is possible.

That said, if I had ongoing fuel system problems and a loaner vehicle started exhibiting the same behaviour, I would look to my fuel supply. Do you frequent a short list of fuel stations?

I pretty much exclusively use Shell and a Hess station occasionally. I have researched this topic a bunch and spoken with a few other BMW dealerships and there have been a ton of these exact issues with the 5.0 engine. There have also been several "buy backs" and "trade assists". One dealership I know of on Long Island has two 750i's that were bought back and have just been sitting under a tree for a few months waiting to get picked up by BMWNA I suppose.


BMW has a problem on their hands with this engine and clearly has no proper fix yet. Six attempts since March is an awful lot of tries to get something correct. If this happened in my first year of ownership this car would be long gone by now via Lemon Law. My dealership has been great to work with and is constantly trying to do right by us, but their hands are tied with whatever BMW authorizes for fixes I assume.
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Old 08-19-2014, 06:45 PM
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Quote:
Originally Posted by basora View Post
I don't think that you can de-tune the engine to the extend that you describe, but it is possible to reprogram the shift points on the transmission, making the car "feel" entirely different ...

Ask for a print-out of the various work orders and make sure it includes all of the "codes". Share on this forum and we'll try to figure it out. Although I'm not certain that the dealer will comply with your request, citing "confidentiality of information", and that the legal owner of the car is BMWFS (lessor) and not you!

Also post this on Bimmerfest.com forum for feedback ...

I will look into getting the actual codes. thanks for that idea.
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Old 07-09-2015, 07:44 PM
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Update to an old post of mine.

We just got it back from the "Customer Care Package" recall and they absolutely 100% changed the tune of the car back to how it was when we bought it. Maybe "changing the tune" isn't the proper terminology, but there is no question the car is noticeable faster, revs higher, and I can actually hear the turbos spooling up which I don't ever remember hearing. The car is night and day different from the one I dropped off monday to get the recall done. Maybe this is all common knowledge, but I don't follow the forums much since I have despised this car for the past few years. It was actually exciting to drive tonight.

Maybe BMW's answer last summer was to turn the boost down on my car until they sorted out what was actuating going on with these N63's? I was eating fuel injectors before last summer and it ran fine from last summer until the recall. I use "fine" loosely since it was a much more tame car than what I picked up at the dealer today.
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