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The sensor is a soleniod valve and it does something between the TB and bypass valve to manage the pressures. I replaced the vac hose and i still have intermittent rough idle and surging but no engine codes. The other hose coming out of that valve is brittle too so I'm gonna change it out and i still need to test the soleniod. I don't have a lot of confidence that any of this will fix the problem but at least it narrows down what's not wrong.
Eric
posted by 130.76.9...
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