Quote:
Originally Posted by TnBob
Yes and mine is pre Code... or at least other than seat belt buzzers right in front of the battery to the right.
Mine is an 89... your link points out... 90 and later.
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Here's the information from the thread that I'm talking about
Quote:
Originally Posted by Dr. Sternschnuppe
Speed signal is used for KE-Jetronic on M102 & M103 from 09/1988 & 09/1987 respectively.

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So you should have a speedometer cable hall effect sensor
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I'm not 100% sure about you not being able to pull codes from your car - but I don't want to fall out with you about it!
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I had another idea =>
How about unplugging the computer and seeing if your idle is steady?
It should be a high idle say about 1500 rpm but if that still hunts or you get surging then you know at least that it isn't to do with any of the CIS junk...