Standard 5 speed manual transmission Lingering engine speed between shifts

[San Vin Gonza]

Im experiencing a problem whers between shift my engine rpm are staying high in the 1800 2000 rpm range when i push the clutch in then finally reach base idol when the truck comes to a near stop. Being in neutral the whole while. I have a 5 speed stick and ive been driving them my whole life so i know the rpms are supposed to return to base when the clutch is pushed in. Any ideas?

 

[Redtruck-VA]

What do you have?

 

[San Vin Gonza]

I have a 2003, 1500 with the 4.7L

 

[BWL]

Any chance your clutch cylinder is failing and it's not fully diesengaging. If you rev it up in neutral does it come right back down?

 

[San Vin Gonza]

Today i replaced the iac valve motor and checked all the vacuum parts, no vacuum leaks and i inspected the pcv system and replaced some hoses that were cracked but it still lingers at 1200 rpm when i shift to neutral and stays there until about 4 seconds after i come to a complete stop then it goes down to normal idle.

 

[BWL]

I wonder if its a vvt solenoid or cam position sensor problem. Any codes?

 

[San Vin Gonza]

Yea if im stopped and i rev it up in neutral with and without the clutch pushed in it comes right back down. If im rolling and i put it in neutral i feel it is working properly because i can rev it up and down no problem it just never returns to base idle until i stop.

 

[San Vin Gonza]

I had an engine light because i disconnected the mass air sensor to see if there was a change in idle, then reconnected it and disconnected the iac and it drove and returned to base idle between shifts just fine but accelerated funny, as to be expected. I then resest the computer after replacing the iac by touching the positive and negative battery leads together for a few minutes.