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Ignition Control Unit 200 1986

After geting advice about my Hall Sender being dead, based on my description, and suggestion to pull a distributor as fix(thanks Rob and Don Foster)I thought before making the trip to the recycling yard I would do the smart thing and reafirm diagnostically the problem was a failed hall sender. With trusty Bentley manual I went thru the diagnostics for the ignition. Tested ICU (battery voltage at terminal 2 to grnd) and ground(continuity term 10 to grnd), ok. Power at the coil term 15 and grnd, ok . Resistance at coil terms ok. ICU switching function, not ok. power to term A of Hall sensor not ok, continuity of wires from ICU to hall sensor ok.

New conclusion,ignition control unit is not sending power to hall sender, so hall sender sends no return signal, so no fuel pump, no ignition spark. Is replacement ICU ($$) first order of business or is there something else in the chain to be tested. Is ICU a good recyle candidate or better purchsed new?

I really do appreciate all the responses I get to my questions and apologize if I over analyze what may be a simple problem.






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New Ignition Control Unit [200][1986]
posted by  yrots  on Sat Feb 15 03:12 CST 2003 >


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