Check engine light came on code P0170. After searching through many previous posts I am still baffled due to these reasons: 1) I replaced my MAS, spark plugs, OVP, and wiring harness about 15K miles ago. 2) I cleaned out my filter and checked the intake hose 3) A local mechanic used his diag. machine and tells me he thinks it is the throttle actuator because of some voltage values that are too high (3.9v vs. .4v) and the values are not reversing?
So I ask if there are any ideas and what the likelyhood is that the MAS is bad again?

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95 C280