Why wont my 4.0L Ford Ranger stay running when cold?
I have a 1997 Ranger (2WD, 4 litre, 5 speed) and when it is cold it starts right away and goes into high-idle (approx. 1800 RPM) but unless I am giving it gas, the RPM's drop after 5 or 6 seconds and it either stalls out or idles very low (approx 200-300 RPM). Once it warms up for a minute or two it idles fine and continues to idle normally when started providing the engine is still warm. Also, I am not sure if it is related, but at time when I take my foor off of the accelerator while driving, the accelerator seems to stick for 3-4 seconds, and if i press the clutch while it is stuck the RPM will jump when go back to idle as normal. Any ideas?
I dont think that the idle hanging is a normal function. It only started when the other problem started (wont stay running on its own when cold) and when I take my foot off the gas, the vehicle continues to accelerate causing it to lunge forward fro 2-3 seconds, and if I push the clutch the idle spikes 800 or so RPM before dropping to idle speed.