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Theory of MAP Fault - Thought Experiment 700 1990

uid 40935's pic
posted by  Goatman on  Tue Apr 28 07:27 CST 2009
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last visit: Sat Jul 26 20:30 CST 2014
[RELATED]

Hi,


I believe that this sensor is flaking out. Look at the symptoms:

1. Lack of throttle response after high vacuum.

2. Sudden rich running.

3. Missing under load.


This is indicative of a fuel management system / stoichiometry error.

A tabulation of engine vacuum and sensor output would reveal a fault, but the price of a new sensor is not substantial.

If the was sensor sticking at end of travel this would lead to the above symptoms.


Goatman






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