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  #1  
Old 07-12-2010, 10:45 PM
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Join Date: Jul 2010
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ML320 Mifire on cylinder 1, 2, and 3

Hello,

I also have an '99 ML320 has the same problem. I've replaced Cam, Crank, Spark Plugs, 3 news Coils on supposedly bad cylinders. All parts name brand are Bosch. I've also swapped spark plug wires around and still have the same problem. I've also cleaned Trans Connector, and other connectors. The codes i have are P0300, P0301, P0302, and P0303. Basically i am having problem on the pessanger's side bank. Things i have not done are clean out are throtle as it is not easy to reach. I have not clean or attempt to change/check MAF.

Any advice is greatly appreciated.

Alex
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Old 07-16-2010, 12:35 PM
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Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,947
Quote:
Originally Posted by alexus009 View Post
Things i have not done are clean out are throtle as it is not easy to reach. I have not clean or attempt to change/check MAF.
Most codes trace back to MAF no matter their description.

Pretty much on any 1999 320 engine, the MAF is bad if it isn't new.

"Cleaning" is wishful thinking.
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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles
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