Code 7 is why you have a low idle most likely. Does the tach in the cluster work?

Now that you've pulled codes, you should clear them and see which ones come back. Some of those might be old.

The governor in the IP really should never control the idle speed, it should be the EDS.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

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