2007 Ford Focus Sticking Throttle - cold only!

Tiny
BNDIMB
  • MEMBER
  • 2007 FORD FOCUS
  • 2.0L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
Okay, I have a 2007 ford focus 2.0 duratec that is having a problem with the throttle only when it is cold outside. First problem occurred when I was on the highway and the throttle got stuck wide open. Upon checking the throttle body and the error codes, I found the throttle body was gummed up with carbon, so I cleaned it. Better for a few days and then back to sticking so I replaced the throttle body and due to an error code I also replaced the IAC valve. (The throttle cable moves freely btw) Yesterday (after it got below 20) I go out to start it and when I hit the accelerator it is sticky again. Hopped on the highway and the throttle body stuck open again. Had to go to work so I could not check it at that time. Next morning I Checked the cable, it moves freely. Throttle body however is sticking and its new! I removed the air inlet and found there is ice in the throttle body. I am going to assume this is causing the problem, will the ice cause it to stick open once on the road? Why is there so much moisture in the throttle body in the first place. Any Ideas?
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Wednesday, December 31st, 2014 AT 7:51 AM

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Tiny
BNDIMB
  • MEMBER
FYI. TPS sensor was replaced as well. Just checked vacuum lines with no leaks found (used the starter fluid method). I do get an error code having to do with the secondary air injection system (its a PZEV engine) which only has to do with the first few seconds of the car starting, from what I am told. It should have nothing to do with the car not idling down like the gas pedal is stuck on the highway.
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Wednesday, December 31st, 2014 AT 9:29 AM
Tiny
HOMER1967
  • EXPERT
You didn't list the code numbers that you got, but I would assume probably a p0410 or a p0491? Either way those codes should have no bearing on the high idle issue. Try this, when the idle is high unplug the iac valve, if the idle is still high try smacking the valve with a plastic or wooden handle, if the idle drops then, the valve is bad( I know it's new). If it still idles high after that, shut off the motor, remove the valve and block of the iac passages and restart the motor. If the idle is now low or it won't idle at all, either the iac valve is bad or it was installed backwards, try marking the way it is installed when you put it back in and if need be you can try switching it around later. As for the ice, remove the air filter and inspect the entire air box and air inlet tubes for cracks, breakes and water intrusion.
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Thursday, January 1st, 2015 AT 8:57 AM

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