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Old February 15th, 2018, 02:27 PM
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Bulldog74 Bulldog74 is offline
 

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I haven't picked up an OBD-1 scanner yet.
After the last write up I checked the MAP sensor again for voltage at BP/MAP center position again. With KOEF it still has 2.5 volts connected (by back probing the connector) but when disconnected from the MAP sensor I do read 5 volts. Also, there's no check engine light. What I'm thinking is that whatever electrical component is in the map sensor is failing after vacuum build up takes place.