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      11-13-2013, 09:19 PM   #1
DocMick
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Check Engine and "Drivetrain Malfunction"

Hello everyone,

I'll start from the beginning with this one. I have an F10 M5 at 11K miles with the usual break-in service and obligatory monthly oil additions, always fill up with 91, no problems until recently.

About a week and a half ago I notice some rough idle. The car sits at the stoplight, tach steady at just under 1,000 rpm, then it dips and the engine shakes a bit, then back to normal. I ask a friend who has the same car, says his does the same thing, so I just watch it... keeps doing it, I take it last week for service. They find nothing, do an oil change, return the car with recommendations to only use Chevron or Shell.

Well today, about a week later, I am pulling away from a stop going about 35 and the engine starts knocking and shaking and I pull off the gas, it slows down, engine is shaky and rough all the way to standstill. Check engine light comes on and the screen reads "Drivetrain Malfunction: drive moderately, maximum drivetrain output not available. Consult service center."

Dropped it off 10min later, then went to work. Service guy leaves message to "update" me... theyre holding the car overnight, not telling me anything about diagnostics.

So I bring it to the wizards on this forum...

It all started with these hiccups during idling.


Any thoughts?
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      11-14-2013, 11:41 PM   #2
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sounds like it could be bad gas, or fuel injectors?

any experts here?
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      11-15-2013, 03:39 AM   #3
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Had this happen to my M5, they replaced the "low pressure fuel pump". issue was gone
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      11-15-2013, 04:13 PM   #4
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That's what they replaced in mine along w a software update. No problems so far
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      11-16-2013, 02:08 PM   #5
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sounds like injectors. maybe some air in the injects...
try using some 100, see what happens, 8 gallons of 91 and 10 of 100.
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      11-16-2013, 03:07 PM   #6
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yeah dont use 87....
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      11-23-2013, 10:42 AM   #7
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Why 91 and not 93?
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      11-23-2013, 02:54 PM   #8
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Fuel injectors and spark plugs apparently

Covered by warranty
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      11-23-2013, 05:03 PM   #9
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Quote:
Originally Posted by dhirm5 View Post
Why 91 and not 93?
Don't think they can get 93 in CA.
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      11-23-2013, 05:04 PM   #10
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Quote:
Originally Posted by DocMick View Post
Fuel injectors and spark plugs apparently

Covered by warranty
Wonder if it was bad fuel that caused the above? If so, I'd ask them to replace the fuel filter also.
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      11-28-2013, 08:02 AM   #11
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This happened to me yesterday--new 2013 328ix.

Same problem years ago with a new Volvo S60.
Problem then was a failed (failing) Oxygen intake sensor. Relatively minor warranty fix.

Suggest this to the dealer .
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      01-03-2014, 08:14 AM   #12
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Quote:
Originally Posted by DocMick View Post
Fuel injectors and spark plugs apparently

Covered by warranty
Please advise if the engine is running smoothly and normally now.
I had the same thing last night on my car and it has 23k miles. I wonder if I should drive it for the weekend before sending it to the maintenance. Please advise.
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      01-03-2014, 07:01 PM   #13
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Had same issue with 2 cars 550i Dinan 2012 and they changed all injectors and spark plugs but that gave me Drive Train Malfunction and was really rough and shaky engine idle.

While sadly today in my M5 for about 10 minutes I would say lack of power... I would push gas pedal all way to 80% and RPM won't go even above 1.5k with D2 or even D3 and I turned the engine off in the middle of the road a couple of times and at the 2nd time came back on as if nothing ever happened!!

Is my nearby Shell 93 gas that bad?
Please advise
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      01-05-2014, 11:32 AM   #14
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No issues since the parts were switched out
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      01-17-2014, 08:16 AM   #15
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I had it come up once sitting in a lot restarted after 20 minutes never came back and that was 5k miles ago lol it's going in for service Monday so hopefully I'll complain and get some free parts
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      01-21-2014, 12:32 AM   #16
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what a dumb, and stupid excuse and recommendation to use only shell and chevron gas. Its all the same gas, except each gas company has there own additive, but every gas station has filters at the pump by LAW in California.
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      01-25-2014, 06:51 PM   #17
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Have you been frequenting the same gas station?

Go to a different station as it could be that station (not brand). If you go to the same shell often, go to a different shell or a chevron or other top tier gas station in your area.

If you picked up water in your tank you will need to have the gas drained out of the M5's tank and or might need parts replaced.
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      01-25-2014, 06:58 PM   #18
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Quote:
Originally Posted by N.S.A
what a dumb, and stupid excuse and recommendation to use only shell and chevron gas. Its all the same gas, except each gas company has there own additive, but every gas station has filters at the pump by LAW in California.
Yes, but we don't live in a perfect world.

Gas tanks are underground. They stay there long term. Water is also underground. Water is heavier than gas. Fill up when the station is low and next thing you know, you have water tainted gas in your tank.

These things happen - regardless of gas station brand.

One reason why I avoid filling up at any gas station while a tanker is present and refilling the station's tanks.
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      01-30-2014, 09:42 PM   #19
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Quote:
Originally Posted by N.S.A View Post
what a dumb, and stupid excuse and recommendation to use only shell and chevron gas. Its all the same gas, except each gas company has there own additive, but every gas station has filters at the pump by LAW in California.
Sounds like you need to do some research. We have done extensive dyno research on a different turbo car with standalone aem ecu and aem wide band. Chevron and 76 generated a lot less knock than shell and arco gas. The car made more horsepower and air fuel ratios were much better on chevron. Yes, the quality is very different from one station to another and from one location to another.
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      01-31-2014, 02:18 AM   #20
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Quote:
Originally Posted by greentrbo95gst View Post
Sounds like you need to do some research. We have done extensive dyno research on a different turbo car with standalone aem ecu and aem wide band. Chevron and 76 generated a lot less knock than shell and arco gas. The car made more horsepower and air fuel ratios were much better on chevron. Yes, the quality is very different from one station to another and from one location to another.
the weather condition must of been a factor. as a owner of gas stations I believe I know what I am talking about. We buy from shell and chevron directly. but I have heard arco/Tesoro is known to have bad quality of fuel somehow. There was a program on tv acutally that proved you get 1 to 2 mpg when you use chevrons gas with techron. Shell is the same as others just they add there marketing fuel labeled "V power" FOR 91 octane and nitrogen enriched. nitrogen is proven to clean your engine. Octane is the biggest factor you need to worry about not what brand.
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      01-31-2014, 02:26 AM   #21
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Quote:
Originally Posted by greentrbo95gst View Post
Sounds like you need to do some research. We have done extensive dyno research on a different turbo car with standalone aem ecu and aem wide band. Chevron and 76 generated a lot less knock than shell and arco gas. The car made more horsepower and air fuel ratios were much better on chevron. Yes, the quality is very different from one station to another and from one location to another.
http://blogs.cars.com/kickingtires/2...u-to-know.html

Check out tip #3. If cars.com who has millions of users to buy vehicles off their website. I thought they mislead their users that all gas is the same.
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