Idle speed adjustment????
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Junior User
Joined: Jun 2007
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Idle speed adjustment????
Is there any way to lower the idle speed on an '01 V10. Mine idles around 850-900rpm. I'd like to see it below 750rpm. I've cleaned the IAC and backed off the set screw for the idle stop but it made no difference. BTW, I've also checked for vacuum leaks. Anybody have any suggestions?
Senior User
Joined: Sep 2006
Posts: 162
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From: MN
I asked this same question about 6 months ago...
Comparing idle speeds, your idle range is perfectly normal
and most all other v10 engines idle around the same numbers
you have provided.
I haven't found a way to lower the idle speed, though i
too would prefer it a little lower.
Comparing idle speeds, your idle range is perfectly normal
and most all other v10 engines idle around the same numbers
you have provided.
I haven't found a way to lower the idle speed, though i
too would prefer it a little lower.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
And you'll get into no alternator action at idle, not much water flowing, not much power steering boost (making the spool valve wear out faster), etc. etc.
The only way to change the idle speed is to reprogram the PCM - the computer (PCM) controls everything, including the idle speed. Closing the throttle plates just means the computer will open the IAC more.
The only way to change the idle speed is to reprogram the PCM - the computer (PCM) controls everything, including the idle speed. Closing the throttle plates just means the computer will open the IAC more.
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
Your idle speed is in the normal range.
The idle speed in drive and in neutral can be adjusted with a tuner such as SCT SF or Diablosport Predator tuners.
I left my idle speeds at factory defaults. IMO theres no need to touch them.
The idle speed in drive and in neutral can be adjusted with a tuner such as SCT SF or Diablosport Predator tuners.
I left my idle speeds at factory defaults. IMO theres no need to touch them.
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Junior User
Joined: Jun 2007
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Never had anything to do with the V10 before this truck, so I'll take your word this is a normal idle speed. It just seems high compared to my old 5.4 F150. But then again the 5.4 while idling at 650rpm wasn't as smooth as the V10.
thanks guys.
thanks guys.
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From: Lubbock, Texas
What are you using to read your idle RPM? My truck tach reads about 800-900 while in park. However, when I monitor with my SCT tuner...650. I found my truck tach is pretty accurate at anything off idle again comparing with my SCT tuner to monitor engine information and compare with the tach.
Senior User
Joined: Nov 2007
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i'm just looking at the gauges on the dash. when in gear at a stop light it feels like i've got my foot on the gas, its pulling even without me giving it gas. When in park it it even seems high. Its all stock and i havn't had it all that long and am trying to waid through the normal maintanence issues one at a time.
thanks
thanks
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paintinpevs91
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Nov 27, 2010 03:28 AM
