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311 ODB Code

posted by  maplebones on  Sun May 17 20:46 CST 2015
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last visit: Thu Oct 23 22:53 CST 2014
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Hi,

I can't help with the idle problem, but I also had an 87 cluster in a 91 240 and had the 311 code.

This made my cruise control inop, and Mr. B told me that the 91 gets the speed signal from the blue/black wire at #6 on the big round plug with the half moon locator pin.

If you release that pin and stretch that wire to the double spade terminal on the 87 cluster, you should have a speed signal. The double spade is the one some people mistake for the tach wire and then they have a fried speedo.

I didn't have any idle problems without the speed sensor, but apparently the computer uses that info on deceleration.

Peter






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New 311 ODB Code
posted by  pageda  on Sun May 17 05:41 CST 2015 >


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