Idle surge after clutch depress and high idle

I had to make a pretty aggressive stop the other day. Right after I stopped I noticed that my truck was idling high (1995.5 2.7). I figured it would go away but it hasn't. Here are the symptoms.

1) Start the truck and the cold idle appears to be normal
2) Once it warms up the idle slowly climbs to around 1700
3) As I drive if the RPM are lower than this (example in 3rd gear going slowly) when I depress the clutch the rpms quickly drop to around 900 and bounce up to 1500 or so twice. Then the idle climbs to 1700 and stays there.

I cleaned my intake and IAC this afternoon with no change. I visually inspected vacuum hoses and tried to listen for any leaks. I can't find anything.

Any ideas what I could try next? The plunger that pushes on the throttle control (I believe this is controlled by the IAC) isn't touching the throttle at all when it's running. It only makes contact when I shut the truck off.

No CEL's and it's running fine otherwise.

Thanks!

 

The engines getting air from some place.. It has a IAC motor to control idle. the plunger your talking about may be for A/C.
Is this the plunger your talking about? Thats just uses vaccum to slow the throttle blade down when you left off gas pedal. Wont effect the idle issue your having.

Brake pedal feel normal? Possiblity the brake booster is leaking vacuum. Plug line to booster and see if there is any changes in the idle.

 

Sorry not much belp here but as mentioned above, fairly sure the "plunger" dealio you inquired about on the TB is to slowly let fuel/air come back to idle when you sharply let of the skinny pedal the your engine dosent fall on its face everytime. Just allows a nice smooth transition from on the gas to off....

 

Mine exhibits similar activity compared to yours. Mine only does it the first few minutes when Im driving though. Example: Start the truck, idles fine..... then when I drive and take the truck out of gear when coming up to a stoplight, the truck will idle high and then drop back down to normal when I come to a complete stop. It only does this twice or three times while the engine is still kinda cold then it goes away completely after it warms up. Been like that for about a year now, doesn't bother me much to be honest. I just drive it. lol