93 Ford Ranger Engine gases on its own.....

[cardumb]

My Ranger has been doing something occasionally. Sometimes when I let off the gas my car thinks that I am still pressing down on it and continues to go. It will maintain the same speed I am driving at not really accelerate, when I take it out of gear the engine revs really loud then keeps going when I put it back in gear. Any idea what this might be?

[juliuszx6]

My truck did the same thing.On mine it was the idle control valve.It is the round looking unit above the throttle body itself right behind and above the linkage were the throttle cable connects to the throttle it has a small wire harness conncted to it and is bolted down with two bolts(very easy to get to).I took it apart and cleaned out the carbon with some carb cleaner.If you look into it there is a spring and a rod inside it.That is were I cleaned out the carbon.If you do take it off do not damage the gasket underneath it so you can bolt it right back on.This cured alot of my problem along with cleaning out the throttle body itself.When I disconnected the harness to it while the truck was running the idle seemed to be fine although that is not really a fix it may help you see if in fact that is your problem.
I am no expert at this so maybe someone else here may help you some more,but maybe this will help.by the way mine is a 93 ranger 3.0 liter so your truck may be different.Good luck

[stuzman]

Originally Posted by cardumb

My Ranger has been doing something occasionally. Sometimes when I let off the gas my car thinks that I am still pressing down on it and continues to go. It will maintain the same speed I am driving at not really accelerate, when I take it out of gear the engine revs really loud then keeps going when I put it back in gear. Any idea what this might be?

First, do a good visual check of any cracked or unplugged vacuum lines. If nothing shows up there, Julius's suggestion about cleaning the throttle body would be a good place to start. Also, make sure that your throttle linkage isn't binding. If a good cleaning of the throttle body doesn't take care of the problem, connect a data scanner and take a look at the MAF sensor readings at idle. It's possible the sensor is registering more air flow than the engine is using. This in turn will speed the engine up since the PCM is injecting more fuel to match the amount of "incorrect sensed" air. I had this problem once on a 96 Getta. A good cleaning of the sensor took care of the problem. Another possibility would be the idle air control assy. Again, you could use the data scanner to compare the desired and actual RPM to see what this valve is doing.