Stock 2002 Beast , 4wd

My idle speed is around 900 rpm and I would like to get it down around 500.

What is recommended idle speed and how is it adjusted?

 

Idle speed is set at the factory on the throttle body by a long grub screw. Your never suppose to touch it, then the computer keeps the idle set with the IAC valve

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EDIT: Warm Idle speed is 800-950 RPM, it is fine.

 

It's not really adjustable, but this has already been hashed out ^^^^

 

Why's the V10 idle so high compared to the 5.4 in the super duty especially since the V10 is just a 5.4 with two extra cylinders? The 5.4 is 600-700rpm I recall...

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My 5.4 Expedition is around 800 rpm ish i'll double check. Def not anywhere near 500-600.

I upped my idle speed on my V10 with my SCT tuner to 975 rpm. better charging at idle, better heat at idle. win/win!

 

The only thing that I have ever seen idol that low (500-600rpm) is very old in-line engines, like my Oliver super 55 gas tractor and it recommends a minimum of something like 70 octane gas.

 

I was thinking the same thing...

 

My experience with Explorers and Rangers is the Ford 302 V8 and the 4.0 OHV and SOHC V6's liked 500-600.

 

My SCT tuner has an option for changing both the idle rpm and rpm in drive.

 

My 04 F350 with the 5.4 idles at 650ish and thats for as long as i can remember it being, NOW if thats wrong and too low maybe thats why I'm having all these problems with my truck stalling when i first start it up?

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