97 expedition wont run/idle - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine> Modern Electronic Engines
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 07-16-2013, 03:58 PM
Registered User
 
Last photo:
Join Date: Oct 2011
Location: LAKE HAVASU CITY
Age: 22
Posts: 167
Wiki Edits: 0

Thanks: 27
Thanked 1 Time in 1 Post
97 expedition wont run/idle

my friend changed spark plugs in his truck and when he went to start it it wouldnt at first, then when it would light up it surged ( like 1500 rpm to dieing )

he plugged his computer in and it said there was a vacuum leak ( go figure )

my other friend used his tool and it came up with the IAC. new iac installed and its the exact same...

when the initial issue was it not running ( before new parts bought ) if i sprayed break clean on the iac it would rev higher consistently.

i guess it goes without saying theres something back there leaking. does anyone have experience with this issue ? is there something silly back there or something known to fail?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 07-16-2013, 04:34 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,428
Wiki Edits: 0

Thanks: 230
Thanked 292 Times in 271 Posts
The PCV hose goes from the pass side valve cover to the rear of the thottle body. It is unhooked or broken.Pretty common
The trouble code was probably IAC- unable to control upper/lower RPM. Has nothing to do with the IAC .other than it cant control rpm.
Next time read and understand code description and save some change instead of buying parts you dont need
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 07-20-2013, 01:30 PM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,764
Wiki Edits: 0

Thanks: 4
Thanked 66 Times in 64 Posts
The PCV vacuum hose leak on these engines is quite common, but the wear on the hoses is hard to see. Also, if you get the Ford OEM hoses they are relatively expensive for what looks like fairly standard molded vacuum hoses. However, the hoses make some sharp turns and Ford molded hoses fit better.

Bruce
Reply With Quote Quick reply to this message

Recent Modern Electronic Engines posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 wont run 400smb_s10 Engine 11 03-26-2007 08:05 PM
283 just wont run right hunt101 Engine 4 11-16-2004 05:46 AM
wont run jtdchevy Engine 3 08-07-2004 01:58 PM
wont run now Lowgmc83 Hotrodding Basics 3 05-03-2004 08:54 AM
350 wont run! hot_rod_kid Engine 25 09-09-2002 05:39 PM


All times are GMT -6. The time now is 02:16 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.