Engine RPMs stay up too long

[LANDSALMON2]

Hi,

I have a minor problem(I Hope) and I'll just throw it out here see if anyone can help.

 

I just bought a 1996 GMC Sierra 1500 2wd with a five speed and the vortec 5.0. I love the truck ,but I've noticed that when I'm shifting as I let off of the throttle the engine RPMs will stay up for as long as 3 to 4 seconds. I especially notice it when I pull up to a traffic signal with the clutch in , the RPMs wont drop for a few moments.

 

Any ideas? Thanks in advance

[bobcat5544]

Hi,

I have a minor problem(I Hope) and I'll just throw it out here see if anyone can help.

 

  I just bought a 1996 GMC Sierra 1500 2wd with a five speed and the vortec 5.0. I love the truck ,but I've noticed that when I'm shifting as I let off of the throttle the engine RPMs will stay up for as long as 3 to 4 seconds. I especially notice it when I pull up to a traffic signal with the clutch in , the RPMs wont drop for a few moments.

 

  Any ideas? Thanks in advance

 

<{POST_SNAPBACK}>

 

 

 

A Few Posiblities

1) IAC Valve

2) Vacuum Leak