when my engine is in idle it clicks/switches back and forth. when it switches it also changes the idle and lowers it then it raises it again.

kinda like it cant tell what the temperture of the air is.

is there some sort of sensor that i need to replace?

 

is your heat or a/c on??? mine does that when ive got that stuff on, does it when the fan kicks on and off too, so yes its regulating the temp of the engine and it takes power to turn the fan........

 

my does that in cold weather,need help to

 

nope, my engine is cold for for a while unless i drive it around for about 15 minutes......it is very cold in winter

 

My truck does the same thing. It clicks like somthing it turning off and ilde changes with the clicking.

 

mine does that too ... every 30 seconds or so ... its kinda weird but I"m not too worried about it ... the truck runs asif its brand new still so .. ?? who knows

 

Defroster on?

Rick

 

hey guys... i actually just bought my truck back in december and i have been having that noise happen to. i brought it into ford to have it checked considering it is still under warranty and they told me it is the a/c compressor or something that is making that noise and that it is normal. If you turn your vent switch to i believe just the vent setting only to the left of off it goes away because that is the only setting that doesnt use the ac. Supposdly the a/c compressor is running on all other settings other then off and the upper vent one to keep the freeon (not sure the spelling) moving through the system, which in turn keeps it lubricated. So as annoying as that noise is its gonna be there and they are claiming it is normal.

 

^^^ Yup just the condensor..scared me the first time too lol

 

most likely ac compressor or fan clucth kicking in.

 

It scared me to but im a big man now.

 

Mine kicks on every 8 seconds or sooner. It stops once the AC is turned off. Just the AC clutch clicking. Not meaning to hijack but does anyone else hear a funny noise when the truck is off and THEN you turn the AC off? It's bugs the crap out of me. Sounds like it might be pressure letting off.

 

Oh5Edge: Vacuum actuators for vents, most likely. I hear it, too.

 

That's exactly what that noise is. No need to panic or bring it in to the dearlership. Doesn't matter if it's 30C or -30C, it will still make that noise.
It will kick the compressor on in:
-Defrost settings (including dash/defrost)
-A/C all settings
-Dash face vent settings

Doesn't matter if you're kicking cold air of heat, the compressor still kicks on.

 

its good to hear that this noise is just the fan or a/c because i hear it frequently and was gonna get worried

 

but why does it affect the idle so drastically?
it can bring it fron 750 to 500. adn when it is cold out 500 doesnt stay running very well

 

The AC is an additional load on the engine... especially in the cold when the compressor lub is a little less fluid. It is very normal, trust me. You can make this go away one of two ways:

Set the thing for vent only or floor only or off. Those are the only HVAC settings that do not run the AC compressor.
OR
Do the famed AC Mod.

 

how do you do the ac mod?

 

take it off!

 

is there a how-to on how to take it out?
i was wanting to do that this summer, but didnt know how to properly do it.
i dont use it anyway, it drains the gas very fast!