So it has been pretty cold around NH lately (below zero at night) and I've noticed that my truck seems like the throttle is sticking upon startup. It usually does rev a little higher upon startup but quickly drops down to normal idle speed after a few seconds. Within the past few days (as I said it has gotten a lot colder here) the truck seems to be idling way too high when in park. I start the truck and it sticks at like 1050 RPM and does not drop until I switch the truck into gear. Once it is in drive, it idles at normal speed and everything, it is just before I put it into gear (no matter how long the truck has been "warming up" even if its been sitting for 20 minutes) it does not drop below 1000 RPM. I figure it was the throttle sticking but it doesnt seem to be the case after inspection. Any ideas?

 

Mine does that too. The colder it is outside the longer the idle will stay up to warm the truck up alittle faster. I think it has something to do with the converters. This morning is was 7 degrees outside and I wasletting my truck run for about 15 minutes and the idle was still at about 1000 rpms.

Sounds normal to me.



James

 

It is the PCM doing its job.

 

Its the electronic choke. If you hit the gas pedal it should turn off and lower the RPM's. Don't know why you would want to though.

 

its working properly- on a typical day my truck will cold-idle up to 1200, then drop to about 700...last week it was -30*F at our home, its cold-idle was about 2300, dropping to about 1800...

 

It's normal. Also the throttle can't be sticking. Everything is electronic and controlled by your trucks computer.

 

Yea good call on that one...brain fart

I thought it was probably just the truck trying to warm itself up but figured I would ask anyways. Thanks for the help guys

 

LOL!

So how does this "electric choke" work ?

 

I don't know about your truck but if I do that I mine if won't shut off the high idle on cold starts by hitting the gas after it starts. Mine will just rev and still idle high till the temp comes up alittle. Those days of jabbing the gas to shut of the choke are over.


James

 

You have an '06 F150 and you think it still has a choke? There hasn't been a choke used on a vehicle for at least 15 years. Word to the wise, when your rig needs service take to your dealer. DO NOT under any circumstances perform the service yourself!

Sorry, but I just had to comment on this!

The main reason for the higher idle is to bring the converters up to temp. so they can start doing their job.