Sounds more like a vacuum problem now. You may have to pull the ACC module to get a peak at the vacuum lines and servos, three I think Listen for hissing that doesn't go away. Also check the feed from the engine compartment. Believe it comes off the rear of the intake manifold, but not sure.

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.