coding plug

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e30121
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Post Tue Jun 07, 2011 8:57 pm

Recently i changed my coding plug from a 4 pot to a 6 pot coding plug on my 320i as i was advised by a member on here because the speedo woudnt go past 80 mph. since i have changed it the car is running rough like it is going to stall or die out. Its had a full service oil plugs etc have been changed.
Any help appreciated thanks
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e30121
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Post Tue Jun 07, 2011 10:02 pm

can anyone help?
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e30121
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Post Tue Jun 07, 2011 11:31 pm

bump
Ajsingh
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Post Tue Jun 07, 2011 11:44 pm

If you are talking about a speedo coding plug then im pretty sure that the issue u have is something else.. By the way, the coding plug on the cluster is only for the rev gauge. The speedometer gets its mph reading from a sensor on the diff..
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StefanAnghel
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Post Mon Apr 16, 2012 9:55 pm

Hi,
Used the search option and found this...
After doing my conversion my mph stopped working...
Any ideas what needs to be checked?!
Thanks
kam-325i
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Post Mon Apr 16, 2012 10:14 pm

conversion from what to what ?
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StefanAnghel
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Post Mon Apr 16, 2012 10:24 pm

Ah! Sorry!
From M40 to M50... Changed the dials from a 4 pot to a 6...the rpm, temp and petrol gauges are ok but not the mph...