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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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Old 05-10-2013, 10:12 PM
mr540i13 mr540i13 is offline
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Location: springfield
Join Date: Sep 2012
Posts: 13
Mein Auto: 1997 BMW 540i
somethong wrong with maf cps ned help!!!!!

Ok so I have a 1997 bmw 540i at first my car was acting up came to find out that the maf was bad so I replaced it and everything was back to normal. But now my car won't start as soon as I turn my car over it wont stay on unless I step on the gas. And this time I even saw white smoke come out of the tailpipe. It did have the error code p0100 it it went away. Im thinking it could be the cps sensors? What do you guys think??
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Old 05-11-2013, 06:25 AM
Topaz540i's Avatar
Topaz540i Topaz540i is offline
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Location: Hillsborogh, NJ
Join Date: Apr 2012
Posts: 1,052
Mein Auto: 2001 540i/6
What is error code 0100?

Is it starving for gas? Maybe a fuel filter is in order?
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Old 05-11-2013, 09:26 AM
edjack edjack is offline
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Location: San Jose, CA
Join Date: May 2007
Posts: 13,276
Mein Auto: '97 540i 6 speed
P0100 Mass or Volume Air Flow Circuit Malfunction. Is this what caused you to replace the MAF?

Are there any pending codes stored?

A bad CPS will throw a P-code.

White smoke denotes water getting into the combustion chamber.

Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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Old 05-11-2013, 09:52 AM
mr540i13 mr540i13 is offline
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Location: springfield
Join Date: Sep 2012
Posts: 13
Mein Auto: 1997 BMW 540i
Well I found out what it was it was the maf that I bought off ebay. I know its cheap but as soon as I took it off and put of the old maf the car started up fine. I drove it for a while and nothing happened. And that was the only code that came up. Even the check engine light went off. So I have no idea what the problem is.
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Old 05-11-2013, 11:28 AM
AH673000 AH673000 is offline
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Location: Delaware
Join Date: Apr 2011
Posts: 425
Mein Auto: 1997 BMW 528i
You forgot to introduce your new MAF to your ECS !

Kidding.... But I am always amazed how many of the sensors and other electronic stuff on the 528s needs to be " introduced" to your inboard computer.... I think the Germans are watching what is yanks are doing to their over engineered cars !
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