I have an issue with my throttle sticking a little. It only sticks for a second and then rpms drop. The way I have found to temporarily fix the problem is to, (even while driving) shut off the ignition and turn it back on. It fixes it every time. It doesn't seem like it is mechanical because it only does it some times. Very annoying though. Any Ideas??? Thanks.

 

Your fix leads me to believe that your IAC is sticking, this is the valve that controls the idle circuit of the vehicle. A lot of times when it is sticking turning off and back on will cure the problems for a short time, usually until the throttle is used.

 

Ya know, my 91 does this very same thing. And i have to restart to fix it. Generally will rev up a little bit while im trying to shift gears. I initally thought it was a vaccum leak, but could never figure it out. Thanks for the tip!!

 

Yes, same for my truck. It's the IAC. Mines a stick so it's easier to shut it off and turn it on without it stalling, which resets the IAC. Never changed or cleaned it, it stopped doing it so badly but still does it occasionally.
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Genesis 1:12

 

hey guys, thanks a lot for your input. I appreciate it. I'll give it a looksee this week. thanks again

 

i see that a new iac is a bit pricy (about 80 bucks for mine). Is it possible to clean the old one? If so what should i use on it?

 

I came across another forum where a guy with an explorer had the same type of problem. It was a mid 90's explorer and he was able to clean his with electrical parts cleaner. I guess if they have a spring valve you can clean them, if they don't then its not possible. Don't know that for sure, but I'm gonna try and clean mine. I'll post my results as soon as I get it done.

 

Don't want to over-post, i'm new here, and new to the F150. I've posted a comment here https://www.f150forum.com/showthread.php?t=19708, and I'll try to cover what limited and basic knowledge i have now in more detail, then I promise, I'll leave this topic alone for others to use the search function.

I just purchased the truck. I know she's good. But there is a 'fuel' type issue of a hesitation, high iddle at start in the morning, [please note, that when i speak this, I'm not a mechanic, and 'Ruth' is a 4.9L], but when i throttle her like James Gandolfini does that chick in True Romance, Ruth gets happy.

Now, when you clean the IAC (it's the little cylinder type thingy, with a black electrical plug in it, directly on top of the throttle-body, which is what the 2 black plastic airflow chambers leading from the airbox => to the top of the engine) Remove the top of the airbox, the 2 clamp-rings attached to the TB, and the 2 screws/bolts holding the IAC to the top of the TB, and the electrical connector. Spray about 1 can of cleaner into the IAC (while it's removed) letting it soak, clean, dump, spray, clean, soak, then air dry for 5-10 minutes before reattaching. Do not go overly happy with the cleaner in the TB, but work the flange/lever and drain/whipe out what gunk you can. Please, do not drop a Q-tip, a leaf or pine needle, your wedding ring, or a used condom, nor do i recommend doing this while its raining.

There was a ton of black residue that came flaking, pooring, oosing, etc., out of mine. I'm going back in to redo the above. As an accountant by day, i have my @nal tendencies, and then I'm reseting the PCM.

Now, if i could just fix the darn belt squeek, and those two rusted brackets at the bottom of the radiator that are supposed to be holding it in place... Well, that's my 15minute break during tax season, time to get back to Jo-Bob's 1120s.

 

I said cleaner, make sure it's Carbuerator, Throttle-Body cleaner an not brake dust cleaner. The TB cleaner has a lubricating agent in it.

 

I totally agree - it's worth a $3 can of tb cleaner to see if it'll free up. Mine didn't, and I ended up putting a new one on, but some guys have been lucky. It's only 2 bolts and 1 connector, so no big deal.

And like hillbillie said, you might as well use some of that throttle body cleaner on the throttle body itself while you're at it. Spray some of that black gunk out of it, and you'll be surprised at the results.