Notices
1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage
Sponsored by:
Sponsored by: Auxito

Slight Vibrate at Idle

Thread Tools
 
Search this Thread
 
Old Sep 10, 2020 | 01:10 PM
  #1  
F150SP's Avatar
F150SP
Thread Starter
|
5th Wheeling
Joined: Sep 2020
Posts: 39
Likes: 1
Slight Vibrate at Idle

What causes a slight shake during idle?
I noticed an ever slight vibration at idle when stopped at the lights today. It idles at 550 rpm in drive and at 700 rpm in park.
I changed the idle air control valve just a couple days ago. It did this idle vibe prior to the IAC valve change..
Anyone know what gives ?
 
Reply
Old Sep 10, 2020 | 01:12 PM
  #2  
ford390gashog's Avatar
ford390gashog
Fleet Owner
20 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Club FTE Gold Member
Low grade misfires, normally associated with spark plugs that are overdue.
 
Reply
Old Sep 10, 2020 | 02:40 PM
  #3  
F150SP's Avatar
F150SP
Thread Starter
|
5th Wheeling
Joined: Sep 2020
Posts: 39
Likes: 1
Changed them 2 1/2 yrs ago. There isn't more than 10 000 miles on them.
Maybe the carbon that was cleaned from the throttle body a couple months ago, mucked them up ??
Black crud was emitted from the exhaust during the cleaning....
Cats were somewhat clogged too !
Changed those to brand new Magnaflow's.
 
Reply
Old Sep 10, 2020 | 08:12 PM
  #4  
Lime1GT's Avatar
Lime1GT
Fleet Mechanic
Joined: Jul 2010
Posts: 1,354
Likes: 31
From: Winnipeg
I don't think you'll get a perfect smooth idle. Engine are run very lean at idle for emissions. You could always try a KAM reset and see if the computer re-calibrating will help.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
kupiec20
1994.5 - 1997 7.3L Power Stroke Diesel
13
Jan 4, 2009 06:01 AM
wildbyon
1997 - 2006 Expedition & Navigator
18
Mar 23, 2007 10:05 PM
snsgraham
Modular V10 (6.8l)
14
Jul 5, 2006 02:41 PM
fire232
Explorer, Sport Trac, Mountaineer & Aviator
3
Sep 16, 2003 08:44 PM




All times are GMT -5. The time now is 07:52 AM.

story-0
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-1
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-2
Rezvani's Latest Post-Apocalyptic 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 | 2026-06-03 11:38:36


VIEW MORE
story-3
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-4
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-5
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE
story-6
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-7
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-8
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-9
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