Hesitation and EGR Question - MustangForums.com

Notices
4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Hesitation and EGR Question

Reply

 
 
 
Old 01-11-2014, 02:27 AM
  #1  
EntropyM
Thread Starter
 
Join Date: Jun 2012
Location: CA
Posts: 4
Default Hesitation and EGR Question

Greetings.
I've got a lot out of these forums so thanks for that. Now I have a question.

2000 GT 4.6L stock, 98,000 miles.
I had a cracked intake manifold so I replaced it with a Ford Racing manifold with the aluminum runner. I also changed the plugs and injector o-rings.
Now I have a severe hesitation during acceleration. I'm thinking vacuum leak but the idle is good (I'll do the carb cleaner test tomorrow).
No codes, no pending codes. Hoses and connectors are all in place.
Checking out the emissions system, I check the EGR valve. Putting vacuum on it causes a bad rough idle so I assume that It's working. I put a vacuum gauge on the EGR valve vacuum line: Cold, no vacuum. Warm idle, no vacuum. Warm at 2000 RPM, no vacuum.
Is this normal or is my EGR solenoid bad. Under what conditions is the EGR valve supposed to open?
Thanks.
Mickey
EntropyM is offline  
Reply With Quote
Old 01-11-2014, 09:31 AM
  #2  
CobraFrenzy
3rd Gear Member
 
CobraFrenzy's Avatar
 
Join Date: Aug 2010
Location: PA
Posts: 791
Default

Carb cleaner test?..just delete the EGR
CobraFrenzy is offline  
Reply With Quote
Old 01-11-2014, 01:10 PM
  #3  
EntropyM
Thread Starter
 
Join Date: Jun 2012
Location: CA
Posts: 4
Default

Originally Posted by CobraFrenzy View Post
Carb cleaner test?..just delete the EGR
carb cleaner test for vacuum leaks.
I can't delete the EGR, CA smog.
EntropyM is offline  
Reply With Quote
Old 01-12-2014, 07:30 PM
  #4  
EntropyM
Thread Starter
 
Join Date: Jun 2012
Location: CA
Posts: 4
Default

Problem fixed.
It was the EGR solenoid. I suppose that it was just a coincidence that it happened days after I changed my manifold. Perhaps I bumped something lose inside.
I found this site that has an excellent step by step troubleshooting guide. It walked me right to the problem. While driving, I was getting a ton of hesitatation and misfire when there was 0 vacuum.
In case this comes up in a search, look here for troubleshooting help: http://easyautodiagnostics.com/ford_...gr_valve_1.php
EntropyM is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GimpyHSHS
4.6L (1996-2004 Modular) Mustang
11
03-12-2018 05:16 PM
Thunderball
4.6L (1996-2004 Modular) Mustang
15
11-23-2015 12:49 AM
UrS4
S197 Handling Section
1
09-30-2015 11:13 AM
treesloth
New Member Area
4
09-28-2015 08:03 AM


Thread Tools
Search this Thread
Quick Reply: Hesitation and EGR Question


Advertising
Featured Sponsors
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.