Replace thermostat on 2001 ford ranger, 4 cylinder, 2.5

SOURCE: 2001 ford ranger clutch

have you check the slave cylinder to see if its moving when someone puts there foot on the clutch.
And check the adjustment on the master cylinder.

SOURCE: Replace thermostat in 2000 ford ranger

the open pipe that you took the hose off of is the thermostat housing, you will need to remove this to reveal the thermostat, make sure you use a new gasket with sealant when reinstalling thermostat housing to prevent leaks and dont over tighten the bolts,run both bolts down as far as you can before final tightning

SOURCE: where is the ignition module control located on 1996 ranger 2.3 e

It does not have an ignition control module. The PCM (powertrain control module) fires the coil pack based on signal it recieves from the crankshaft position sensor and the camshaft position sensor.

SOURCE: I am trying to find out how to replace the thermostat on my 4 cylinder.

Here You go this should help a lot.

SOURCE: 2001 Ford Ranger V6 timing chain

Hello;
The Ford motors are pretty good. I had 280K on a 2.9 V-8 that only needed the oil changed every 3K. Unless you have fluctuatuation in the timing then you should be ok.
These engines use a chain rather than a belt and have excellent life.
Thanks;
Rich RPM Northwest