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Old 08-07-2011, 11:50 PM   #8
chevybuldr
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Join Date: Oct 2008
Location: Livermore ca
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Re: Somebody tell me what this is please, other then a black box

Quote:
Originally Posted by my4by2 View Post
I believe that is the knock retard ECU for the distributor - should have a knock sensor in the block that runs to it. They used this to retard the timing automatically when it sensed any engine knock.
But on an '88 with TBI wouldnt that be in the ECU?
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