Bimmerfest BMW banner

1 - 9 of 9 Posts

·
Registered
Joined
·
10 Posts
Discussion Starter #1
Hey guys,

My car has been doing this for a while and I can't figure out what's the issue.

If I drive steady 60mph on a straight stretch, I can feel the car stutter or randomly lose power for a split second then continue being normal. You can visually see it on the MPG gauge, it will be a steady 30mpg, then jump to 50mpg when the stutter happens, then back to 30mpg.

It also does it when I press on the gas to go up a steep hill. It will be fine, and the engine will stutter randomly.

Any thoughts on how to fix this? Is it a cylinder misfiring? Fuel filter?

I guess people are going to ask what type of gas I use. I read on the BMW forums that they only get gas from Chevron with Techron, so that's what I've been putting in my car.
 

·
Nuclear engineer
02/2012 X5 35d M57Y CPO 99K miles NOKIAN WR G3 12K miles
Joined
·
17,463 Posts
We need to hear the Diagnostic Trouble Codes as read by a BMW-centric code reader.
 

·
Registered
Joined
·
5,991 Posts
Also I can' see where you said which kind of car you have with which
Engine.
328, 335 or something else .
mileage and age of the car are also needed.

335 turbo problems are completely different than 328 non turbo problems.
Which motor? the common US motors are n52 n54 and n51.
Or maybe you have a diesel or one of the 4 banger if you are in Europe .

We are not psychic
 

·
Registered
Joined
·
10 Posts
Discussion Starter #7
Also I can' see where you said which kind of car you have with which
Engine.
328, 335 or something else .
mileage and age of the car are also needed.

335 turbo problems are completely different than 328 non turbo problems.
Which motor? the common US motors are n52 n54 and n51.
Or maybe you have a diesel or one of the 4 banger if you are in Europe .

We are not psychic
Sorry, I should have included this in my first post.
My car is 150k miles, N51 engine 328I with Xdrive.

relative4; said:
What software did you use?
I used INPA as my software


francispj; said:
Get the power cable from the battery checked. It's a model recall and mine did the same till I had it fixed
I will call my dealer to see if this recall as been done on my car before (I purchased it used about 4 years ago)

If it ends up not being the power cable or it has already been recalled, any other suggestions to check?
 

·
Registered
Joined
·
5,991 Posts
N51 also suffers from the fuel lines in the gas
tank self disconnecting. There is a 15 year warranty
on all Sulev parts if you can get them to honor it.

If you are loosing all electrical power it might be the cabin
fuse box recall problem . The connector from the battery
goes bad on the back of the fuse box.

If its the fuel line problem there will be no diag fails .
You just loose fuel pressure . The pump is in the gas
tank . If this is the problem BMW wants to replace the whole
tank with the fuel pump in it. This same problem carry's over
from the e46 version of the ultra low emission engine.
 

·
Registered
Joined
·
10 Posts
Discussion Starter #9
N51 also suffers from the fuel lines in the gas
tank self disconnecting. There is a 15 year warranty
on all Sulev parts if you can get them to honor it.

If you are loosing all electrical power it might be the cabin
fuse box recall problem . The connector from the battery
goes bad on the back of the fuse box.

If its the fuel line problem there will be no diag fails .
You just loose fuel pressure . The pump is in the gas
tank . If this is the problem BMW wants to replace the whole
tank with the fuel pump in it. This same problem carry's over
from the e46 version of the ultra low emission engine.
I think you're right about the fuel issue. I brought it to the dealer to look at it previously and they said it was my low pressure fuel pump (different issue). So I replaced the fuel pump and the fuel module and it fixed most of the issues I was having, but this loss of power for a second while driving is very annoying.

Put the brand new pump and module in about a year ago.
 
1 - 9 of 9 Posts
Top