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Re: '97 Lumina strange lack of power---HELP?
Your problems sound like a vacuum leak. When the engine is under load or part throttle, the vacuum leak will cause the most trouble. At WOT, the car is running very low vacuum, so the leak will not cause any problems. The vacuum lines are a combination of rubber and hard plastic, and become brittle with age. I'd start by looking at the line that goes to the transmission vacuum modulator first.
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Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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