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  #1  
Old 10-30-2012, 07:51 AM
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strange response

I changed my fuel filter. with oem brand. filled up full gas tank.
drove 40 miles and a quarter of the tank gone.... .weird..
filled up full again. this is fueled up with premium gas...

next day i drove 4 miles and than the throttle became stange...
it felt weak and unresponsive. when i floored it, it didnt budge. kind of pushing and stopping response....

weird but than it got better...

what could cause these weird activitys?
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  #2  
Old 10-30-2012, 09:03 AM
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restricted fuel flow, perhaps? somethink kinked?
or low fuel pressure? leak somewhere? siphoning?
any fuel smell, puddles on the ground?
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Old 10-30-2012, 09:09 AM
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Is "OEM" the brand name or is it Mahle, Mann ...? If it's the brand name, it is NOT a good brand. There is an aftermarket company selling parts under OEM name.
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Old 10-30-2012, 09:36 AM
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May sound silly, but you did install everything correctly, right? Not backwards? Sometimes it's the simple stuff that'll get missed.
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Old 10-30-2012, 10:36 AM
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Quote:
Originally Posted by NicholasW View Post
Well, obviously this is your problem, Alex!


May sound silly, but you did install everything correctly, right? Not backwards? Sometimes it's the simple stuff that'll get missed.
hmmmm, I dont think thats my problem... but yea its the correct way. I made sure of that. If you install it wrong than it doesnt start at all.

Is "OEM" the brand name or is it Mahle, Mann ...? If it's the brand name, it is NOT a good brand. There is an aftermarket company selling parts under OEM name

The OEM part number, which happens to be made by Mahle, I dont think BMW would make there own fuel filter.

restricted fuel flow, perhaps? somethink kinked?
or low fuel pressure? leak somewhere? siphoning?
any fuel smell, puddles on the ground?

I dont know why it would be restricted, worked fine for 50 miles. not a problem. nothing kinked. and fuel pump works.... no puddles. smells or leaks... and i dont think it could be bad gas either... and it doesnt feel like a air intake problem either....
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Old 10-30-2012, 11:10 AM
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Curious why you changed your fuel filter in the first place. Were you addressing some symptoms or just preventive maintenance? Did you have some other work done recently that could be related? Just trying to see if you had no problems prior to your current issue.
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Old 10-30-2012, 11:36 AM
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if the original wasn't having any problems you could try swapping back if you still have it.
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Old 10-30-2012, 12:48 PM
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Quote:
Originally Posted by TwinsPoppa View Post
Curious why you changed your fuel filter in the first place. Were you addressing some symptoms or just preventive maintenance? Did you have some other work done recently that could be related? Just trying to see if you had no problems prior to your current issue.
yes just preventive maintance, and did another oil change. looks like theres a small leak in the oil pan. and it burns oil. after 2k miles the oil was filthy. So im trying castrol titatinum synt, maybe it will last longer than 2k.

i have the old fuel filter. its exactly the same. brand and number. exact!

and i just took the X for a spin during work break, it seem fine now?! accelerates like before.

I guess i'll just put some fuel injector cleaner for now.
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Old 10-30-2012, 03:06 PM
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Air pockets in the new filter? May take some time to work the bubbles out.
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Old 10-30-2012, 03:18 PM
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Quote:
Originally Posted by alex77ae View Post
The OEM part number, which happens to be made by Mahle, I dont think BMW would make there own fuel filter
BMW don't make their own filters, but they do buy filters made to their own specification. Those suppliers also make similar filters and sell them directly. Not necessarily the same, even if it looks the same. And this leaves aside the problem of fake Mahle and Mann filters being made in China and sold through NAPA and other big name stores.

Take it out and see if it is different.
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