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Why is the engine RPM in idle some time go down to near 300 up to near 1300 frequently in 1998 deville?
Wiki User
∙ 16y ago
Could be a vacuum leak or fuel pressure regulator.
Wiki User
∙ 16y ago
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will the electric fans stay on after you turn engine off on a 1998 deville 4.6L
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airfilter housing 1998
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