Hi,
I have used the forums for a long time now and registered a while ago, but this is my first post.
I have a model 1987, September 86 build 325es. I chipped it and have been trying to swap the tach for a 7k tach. My gauges cluster is a motometer cluster which uses the newer style tach (very small pcbs on back). Initially I tried with out any research to put a VDO set in from a 91 318i which did not work.
I then read the often referenced strictly eta tach article and found I needed one from an 87+ is.
I just tried putting in a motometer tach from an 89 325is and retained my original coding chip (the one on the front), and it reads 0 at idle and then will bump to 1000 at engine speed of about 2k. From there it becomes off exponentially.
I have read hundreds of threads about tach swaps and have never come across this. Any help is greatly appreciated.
Thanks
I have used the forums for a long time now and registered a while ago, but this is my first post.
I have a model 1987, September 86 build 325es. I chipped it and have been trying to swap the tach for a 7k tach. My gauges cluster is a motometer cluster which uses the newer style tach (very small pcbs on back). Initially I tried with out any research to put a VDO set in from a 91 318i which did not work.
I then read the often referenced strictly eta tach article and found I needed one from an 87+ is.
I just tried putting in a motometer tach from an 89 325is and retained my original coding chip (the one on the front), and it reads 0 at idle and then will bump to 1000 at engine speed of about 2k. From there it becomes off exponentially.
I have read hundreds of threads about tach swaps and have never come across this. Any help is greatly appreciated.
Thanks
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