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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 05-13-2010, 01:26 PM   #1 (permalink)
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i have a favor to ask

can anyone find out what the resistance for the air flow meter when it is about halfway open and when it is fully open? i would really apprecite it. i am gonna try to trick my computer into thinking it is working. lol
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Old 05-14-2010, 07:18 AM   #2 (permalink)
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What model are you talking about, it might be easier just to disconnect it if it's faulty.
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Old 05-14-2010, 11:45 AM   #3 (permalink)
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yea i can get it for you but i need year,model
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Old 05-14-2010, 12:51 PM   #4 (permalink)
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sorry its a 90 525. i was on my phone and didnt think about it. the car just runs like crap below a bout 3500 rpm. im thinking its either this of the fuel filter. i smell a lot of fuel from the exhaust. any other suggestions? btw. this forum is awsome. i will be using it a lot due the fact the i went out and got a new bmw that needs a lot of work.

i am getting code 1215. would just disconnecting help my power loss. and would it throw the service engine light?

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Old 05-15-2010, 03:44 PM   #5 (permalink)
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1215- the code indicates an open or short to ground at mass airflow sensor or wiring

you said it was running like crap well your car is running very rich at idle because of that sensor

good luck wiring is one of the most challenging tasks of the automotive industry especially on BMW's
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Old 05-15-2010, 09:31 PM   #6 (permalink)
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thank you. I am gonna try to rewire it in the morning. any tips for doin bmw electrical?
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Old 05-15-2010, 09:50 PM   #7 (permalink)
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My only tip is to make sure you find some good diagrams and be careful. Best of luck.
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Old 05-16-2010, 12:02 PM   #8 (permalink)
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im not gonna cut any wires yet. just gonna run secondary wires to where they go. a lot of wire tracing but if it works it will be worth the time. i will let you guys know what i come up with. hopefully the family gives me the time i will nee too.
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Old 05-17-2010, 07:41 PM   #9 (permalink)
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do you need a diagram on that sensor??
cus i can get you one
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Old 05-17-2010, 10:23 PM   #10 (permalink)
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first try to unplug it first. It will run on default mode as far as I know. That way you will know for sure that is the issue.

if that fixes it temporarily then move on to fixing the wiring. Look for any frays or weird spots in the wire before you take larger things apart.
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Old 05-18-2010, 01:21 AM   #11 (permalink)
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theluis - yes... some good diagrams would help.

Numark --when i disconnect the sensor it gets almost undriveable, not just crappy. but with the code my computer is giving me i want to fix that first. then move on to other problems.

can anyone tell me what affect it would have if i just ran a new ground and 5 volt power to the sensor plug? would it have the same effect as if it were all working correctly? i checked the voltage to the plug at the big plug on passenger side and was only gettin 2.5 volts. and suggestions on how to fix the issue permanently?
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Old 05-21-2010, 10:49 PM   #12 (permalink)
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ok so i just ran a piggy back ground to my shock tower bolt and it got rid of the code. now i am gettin code 1444 which tells me it was a good idea. lol. anyone have any suggestions on where to permanently route the ground and whether or not i should keep it as a piggy back wire.
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