Idle on a 460
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Senior User
Joined: Feb 2010
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Idle on a 460
97 f250 460 auto
Idles 1000 to 1100 when warm, seems a tad high to me for drivability. Should I adjust it and to what?
Recently went back to stock throttle body from bbk. Might have lost a little snoose but seems to drive better / doesn't kick down on freeway near as much and mpg might have increased.
Idles 1000 to 1100 when warm, seems a tad high to me for drivability. Should I adjust it and to what?
Recently went back to stock throttle body from bbk. Might have lost a little snoose but seems to drive better / doesn't kick down on freeway near as much and mpg might have increased.
Lead Driver
Joined: Jul 2007
Posts: 7,868
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From: Rhode Island
Warm the engine up, unplug the idle valve, and then set the idle to just high enough that the engine can barely keep it self running. So probably 450-500 RPM or so. Then plug the idle valve back in.
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
Sounds like its sucking air, idle is not adjustable it is computer controlled.
Set screw on throttle body is a stop screw, prevents plates from digging into the throttle body fully closed.
Stop screw should be sealed in place, if appears its been tampered with then yea it needs properly set back to its original position.
Set screw on throttle body is a stop screw, prevents plates from digging into the throttle body fully closed.
Stop screw should be sealed in place, if appears its been tampered with then yea it needs properly set back to its original position.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
Yeah that set screw on the TB is not supposed to be touched, idle speed is cntrolled by the computer but it must get accurate throttle position data and the Idle bypass valve must be operational and not clogged or sticking, so look into those 2 devices first.
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New tps - and the stop screw looks like it's been messed with - if I remember rite when I switched the TB the butterfly's were cracked open a tad
I do not know what or where the idle bypass is - I'll try and look it up
What would be the idle rpm I'm looking for?
I do not know what or where the idle bypass is - I'll try and look it up
What would be the idle rpm I'm looking for?
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