so my problem is a little different
2001 ford ranger xlt 4.0 V6 manual

Start the truck in park and it runs fine. Put truck in gear and start to accelerate and when truck gets over 2000rpm it will not drop back down. Go to shift and engage clutch still no drop in rpm (sometimes jump 500-1000rpm) move gear into neutral and truck will keep at 2000rpm or more(even if below 2000rpm I shift to neutral and truck will automatically increase rpm till reaches 2000 then pins. (No check engine light or codes)

1.checked acceleration cable and it’s snag free no impingement s

2. Checked cruise control cable and it’s snag free no impingement (disconnect cruise cable and drove around to see if possible leak in vac to cruise allowing plate to hold open )

3. Cleaned throttle body and plate with wire brush and throttle body cleaner(looks brand new now)

4.checked throttle plate spring and still tight (plate opens and closes without impingement

5. Replaced air filter

6. Checked all hoses for vacuum leak. No visible leaks.(unplugged IAC when idle truck stalled out leading me to think also no big leaks in vac system

7. Cleaned mass airflow sensor with mass airflow cleaner

8. Replaced Idle Air Control Valve

9. Replaced Throttle Position sensor

10. Replaced PCV valve and checked elbows for cracks

11.added sea foam to engine

12. Computer dusted cleaned wire plugins to all intake sensors

13. Reset ecu ( disconnected neg battery connection, left positive connection still on battery. Ran jumper cable from disconnected neg connection to the positive connection still on battery. Let sit for 30 mins to drain power to grounds, put key in car waited 30 seconds. Started let sit 10 mins to relearn idle then drove for 15 mins cycling through all gears


Still pinning at 2000rpm in neutral and during shifting of gears( rpm will stay at whatever it’s at during gear shift leading to rough shift and rpm to drop when in gear and take foot off clutch.

 

2001 ford ranger xlt 4.0 V6 manual

Start the truck in park and it runs fine. Put truck in gear and start to accelerate and when truck gets over 2000rpm it will not drop back down. Go to shift and engage clutch still no drop in rpm (sometimes jump 500-1000rpm) move gear into neutral and truck will keep at 2000rpm or more(even if below 2000rpm I shift to neutral and truck will automatically increase rpm till reaches 2000 then pins. (No check engine light or codes)

1.checked acceleration cable and it’s snag free no impingement s

2. Checked cruise control cable and it’s snag free no impingement (disconnect cruise cable and drove around to see if possible leak in vac to cruise allowing plate to hold open )

3. Cleaned throttle body and plate with wire brush and throttle body cleaner(looks brand new now)

4.checked throttle plate spring and still tight (plate opens and closes without impingement

5. Replaced air filter

6. Checked all hoses for vacuum leak. No visible leaks.(unplugged IAC when idle truck stalled out leading me to think also no big leaks in vac system

7. Cleaned mass airflow sensor with mass airflow cleaner

8. Replaced Idle Air Control Valve

9. Replaced Throttle Position sensor

10. Replaced PCV valve and checked elbows for cracks

11.added sea foam to engine

12. Computer dusted cleaned wire plugins to all intake sensors

13. Reset ecu ( disconnected neg battery connection, left positive connection still on battery. Ran jumper cable from disconnected neg connection to the positive connection still on battery. Let sit for 30 mins to drain power to grounds, put key in car waited 30 seconds. Started let sit 10 mins to relearn idle then drove for 15 mins cycling through all gears


Still pinning at 2000rpm in neutral and during shifting of gears( rpm will stay at whatever it’s at during gear shift leading to rough shift and rpm to drop when in gear and take foot off clutch.

 

Just to confirm, its a manual transmission so there is no "Park"
Does your speedometer work?

Emissions require that a manual trans engine, while in motion, remains above 1,500rpms, when speedometer drops under 5MPH then RPMs can drop down to idle levels, 750-800

RPMs should stay the same when shifting, another emissions thing, but if you leave the clutch pedal down 7 or 8 seconds RPMs should drop a little, but not down to idle levels until speedometer is under 5MPH

2,000rpms sounds high, I would call a Ford Dealer and have them look up your VIN to see if there is a software update for the computer, there were issues in the early 2000's with Ford computers holding RPMs too high in manual trans vehicles, a software glitch, you have to pay for the update if there is one, its well out of warranty

I assume the CEL(check engine light) works, comes on with key on and then goes off after engine starts?
Just checking, I know you said no CEL, but didn't say that it worked, lol

 

sorry I meant to say neutral. Yes my speedometer is working it matches the speed on my GPS. I’ll have to look into that update. The check engine light also works.

 

I just think it’s weird that it will pin anywhere from 2000-4000 when shift from gear to neutral and coast. The rpm will hang there till complete stop( I can upshift and get the rpm below 2000 and it won’t pin if i shift back to neutral)

 

I've fought similar issues with my truck, where the RPMs wouldn't drop when I pressed the clutch in, although it would eventually drop after about 5 seconds or so. Ultimately my issue ended up being a faulty TPS, but I see you have already replaced that along with the IAC. I would not rule those two out, I once put a new Duralast IAC on my truck and it caused my truck to rev up in between shifts, and it only stopped when I put a Motorcraft IAC on the truck. I don't know what it is about aftermarket parts on these trucks but they just don't work well.

There may be another issue at hand that I'm not seeing, however you've checked the basics. From my experience, I would re-evaluate the IAC and TPS, as they're usually the most likely culprits for weird idle issues like this.

 

Yes, its an emissions thing, but as said seems a little high to me

What ever the RPMs are at when you press clutch pedal down(while above 5MPH) computer should hold that RPM