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MikeD930 MikeD930 is offline
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Join Date: Apr 2008
Location: missouri
Posts: 1,566
My '87 930 has Protomotive Motronic EFI that was installed back in '02. It is a MAP system. It runs great most of the time. For some reason when it's really cold its idle speed would hunt around almost dying and also there's an occasional miss when cruising. Perhaps these little problems are related to bad sensors such as bad CHT or O2 sensors?

As Kris said I have no option to change the DME programing except thru Protomotive but have thought about adding a piggy back air/fuel controller. I need to invest in a wideband system before I do anything stupid.

I would like to hear others using Protomotive EFI to chime in. Subscribed.
'87 930
Old 02-03-2010, 08:07 PM
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