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Old 01-22-2011, 05:23 PM
82Stang 82Stang is offline
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Re: 1994 dodge 1/2 ton pickup 318 eng

Yes, that up and down idle sounds like a vacuum related issue. Or an issue with one of the sensors related to vacuum like the IAC or the TPS or the EGR, anything around the upper intake that connects to a port. Even if things 'look' okay, try unhooking and rehooking vacuum lines/hoses to make sure they are actually using vacuum and holding.
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