Idle Spike.

Probably a simple answer to this,but i'm in the dark.Have an 83 440LTD.When i'm cruisin the idle is fine.When i start it it's fine for a while.But after 30min of riding or so whenever i stop the idle spikes to 4000rpm.Especially annoying at red lights and in traffic.I've adjusted the idle down to between 2 3rpm when in neutral but it always seems to work itself back up.Is there something sticking?
Thanks.Scott

whitedevileone wrote:

Probably a simple answer to this,but i'm in the dark.Have an 83 440LTD.When i'm cruisin the idle is fine.When i start it it's fine for a while.But after 30min of riding or so whenever i stop the idle spikes to 4000rpm.Especially annoying at red lights and in traffic.I've adjusted the idle down to between 2 3rpm when in neutral but it always seems to work itself back up.Is there something sticking?
Thanks.Scott

Is there something sticking? --- possibly something in the cable linkage, and suspects would also include air leak, or hanging advancer, or too lean pilot mixture.

Good Fortune!