Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

how do i adjust idle without affecting curb idle

Thread Tools
 
Search this Thread
 
Old May 6, 2010 | 08:39 PM
  #1  
Hometown Pride's Avatar
Hometown Pride
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 250
Likes: 0
From: South Western Ontario
how do i adjust idle without affecting curb idle

1980 f150 l6 2wd carter 1barrel carb. The idle on my truck is great when its in gear, but when I shift to neutral it idles to high. What do I do to fix this without affecting the curb idle?
 
Reply
Old May 6, 2010 | 08:58 PM
  #2  
fepowerguy8's Avatar
fepowerguy8
Posting Guru
Joined: Feb 2008
Posts: 1,081
Likes: 0
From: Loganville, WI
If you have a tach I usually set the idle to 400-500rpms in park and running. I also adjust the air/fuel mixture screw to get max vacuum. Has not failed me yet.
 
Reply
Old May 6, 2010 | 09:30 PM
  #3  
Franklin2's Avatar
Franklin2
Moderator
25 Year Member
Photogenic
Community Builder
Community Influencer
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
Club FTE Gold Member
Is the distributor vacuum in the wrong location? If you want to see if this is the problem, take the dist line off and plug it, and then set the idle, and then with it still plugged, put it in and out of gear.

The overall tune and condition of the engine will also cause your problem.
 
Reply
Old May 7, 2010 | 09:27 AM
  #4  
LARIAT 85's Avatar
LARIAT 85
Cargo Master
20 Year Member
Joined: Dec 2004
Posts: 3,362
Likes: 22
From: Florence, SC
Originally Posted by fepowerguy8
If you have a tach I usually set the idle to 400-500rpms in park and running.
If you have an automatic, I would set the idle at about 500rpms IN GEAR (with the emergency brake on, of course) and running. The rpms will come down a bit when the truck is in gear from Park or Neutral. Anything less than that and my truck starts to shake and shudder. My own truck idles at about 750 rpms when in park or neutral this way, and never stalls when I put it in gear.

Originally Posted by Franklin2
Is the distributor vacuum in the wrong location? If you want to see if this is the problem, take the dist line off and plug it, and then set the idle, and then with it still plugged, put it in and out of gear.
Listen to Franklin! It sounds like you have your vacuum advance (from the distributor) hooked to full manifold vacuum. That will cause the problem you describe. Does your truck "slam" into gear when you go from Park? Make sure your vacuum advance is hooked up to a ported vacuum port.
 
Reply
Old May 7, 2010 | 01:18 PM
  #5  
Hometown Pride's Avatar
Hometown Pride
Thread Starter
|
Senior User
Joined: Dec 2006
Posts: 250
Likes: 0
From: South Western Ontario
Thanks for the advice, I will try these things.
 
Reply
Old May 7, 2010 | 08:49 PM
  #6  
ctubutis's Avatar
ctubutis
Moderator
15 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Club FTE Gold Member
Also ensure you're not misreading the timing marks' orientation to the pointer, I've seen guys
try and time an engine using the wrong side (or edge) of the pointer.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
truelygr8
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
5
Feb 9, 2014 12:32 PM
03trueblue
1973 - 1979 F-100 & Larger F-Series Trucks
23
Aug 24, 2012 01:44 PM
lanechange
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
11
Jul 1, 2010 08:39 AM
spuds0828
1978 - 1996 Big Bronco
2
Sep 30, 2009 12:26 AM
4caster
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
1
Aug 9, 2009 04:43 AM




All times are GMT -5. The time now is 05:15 AM.

story-0
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-02 21:45:57


VIEW MORE
story-1
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-2
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-3
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-4
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-5
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-6
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-7
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-8
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-9
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE