uneven idle
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Tuned
Joined: May 2014
Posts: 316
Likes: 16
From: Richmond, VA
uneven idle
When I first start my truck, it has a tendency to rev. After it's warmed up a while, it evens out. But it always revs once it's started. I have a vacuum hose disconnected...err...broken under the hood. I'm wondering if that's it. It was a red/pink color.
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Pink hose runs to the Air Diverter/Bypass valve for either the TAB.
If its the red, then fuel psi stays pegged out, and you have a consient vacuum leak. If its the pink line, then you have a vacuum leak when the PCM commands the TAB solenoid to function.
Still.......a vacuum leak....
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