97 5.4 p1409 - 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 09-06-2013, 05:57 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 5.4 p1409

I was given this ford truck from a close friend who moved away.

i took apart the throttle body and cleaned the ports ( they were never blocked), along with the tubes from the exahust

new dpfe
new evr solenoid.
egr works fine

not sure what to do now ?!


from other similar issues on the web, i guess i could have a computer problem or a blocked CAT...


i figured id start here where everyone knows their stuff before i go elsewhere.

thankyou guys !!!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-06-2013, 06:02 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,082
Wiki Edits: 326

Thanks: 777
Thanked 1,057 Times in 879 Posts
Quote:
Originally Posted by LEROYDOZOIS View Post
not sure what to do now ?!
Ummm, maybe sit down and knock back a cold one?
Reply With Quote Quick reply to this message
The Following User Says Thank You to techinspector1 For This Useful Post:
LEROYDOZOIS (09-06-2013)
  #3 (permalink)  
Old 09-06-2013, 06:19 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,299
Wiki Edits: 0

Thanks: 220
Thanked 272 Times in 252 Posts
The code description is important. The description says P1409- EGR Vacuum regualtor solenoid CIRCUIT FAULT. Its an electrical problem.
I see this all the time. Guys see a code and throw parts at it.
I see you put a regulator solenoid on it. Thats OK.
Chances are there is a short or an open in the circuit. A short is a circuit that has a mechanical defect that allows the current to flow to a ground path before it reaches its intended load . Like when the insulation is gone and the wire lays there and sparks.
An OPEN is where a wire is broken and the circuit is inoperative due to lack of power to the load or the return path to ground from the load.
Its a wiring problem my friend. If it were me, I would peel the insulation back on the wiring from the solenoid, for a few feet to see if the two wires are melted together....most likely from exhaust heat.
Wiring can be broken also.The connector could be broken at the plug for the device, or at some point the motor was changed and a wire was yanked in half.
I would look the harness over from the engine over to the PCM for anything obvious , then go from there and back probe the 2 wires in question up to the PCM pin terminals.
With the key on the solenoid plug will have 12 volts to one side Green with red IIRC the other terminal will be the ground path controlled by the PCM. Check for power with a test light ...if OK, then check across the 2 terminals. If the light lights...then the ground side is shorted to ground.
If this is 2 much to comprehend...knock a few back and re read later.
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
The Following User Says Thank You to LATECH For This Useful Post:
killeratrod (09-06-2013)
  #4 (permalink)  
Old 09-06-2013, 07:53 PM
Registered User
 
Last photo:
Join Date: Nov 2012
Location: Florida
Posts: 2,442
Wiki Edits: 0

Thanks: 195
Thanked 460 Times in 409 Posts
hey thanks LATECH. at first i thought the OP was promoting a radio station .
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-07-2013, 12:24 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
i peeled back about a foot of insulation last night and found nothing yet. tonight ill check and see which way the short is going. i was hoping to avoid tearing into the clustered loom going down the vlave cover but i guess it needs to be done =]
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-07-2013, 12:48 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
i peeled back about a foot of insulation last night and found nothing yet. tonight ill check and see which way the short is going. i was hoping to avoid tearing into the clustered loom going down the vlave cover but i guess it needs to be done =]
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-07-2013, 02:08 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,299
Wiki Edits: 0

Thanks: 220
Thanked 272 Times in 252 Posts
Did you verify power on one ?
The other will be grounded when the ECM commands it. If it is grounded all the time then it has a short.
The ECM grounds the valve with a pulse width duty cycle.
The ECM grounds the solenoid when engine is warmed , over 176 IIRC , and when it sees part throttle and road speed. It wont ground at wide open, but it will when the ECM determines a warmed up cruise speed condition.
The power side will be easy to check...the ground will be a little more in depth.
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-08-2013, 03:23 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
Quote:
Originally Posted by LATECH View Post
Did you verify power on one ?
The other will be grounded when the ECM commands it. If it is grounded all the time then it has a short.
The ECM grounds the valve with a pulse width duty cycle.
The ECM grounds the solenoid when engine is warmed , over 176 IIRC , and when it sees part throttle and road speed. It wont ground at wide open, but it will when the ECM determines a warmed up cruise speed condition.
The power side will be easy to check...the ground will be a little more in depth.

im gonna re read your first post about checking the ground short. i also found another source on the net that put it in nube terms for me.

i do know i have 12.7 volts in the plug

im off work now, ill be doing this stuff in a few minutes
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-08-2013, 03:53 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
okay........

i tested the plug and there is no short to ground.

there is 12.10 volts inside the plug.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 09-08-2013, 04:25 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,299
Wiki Edits: 0

Thanks: 220
Thanked 272 Times in 252 Posts
With the solenoid plugged in and the key on, does the solenoid "click" if you manually ground the ground side?
If it works, you need to check the continuity of the ground wire from the device to the ecm.The wire could be broken or corroded in two.If not then the ECM needs verified.
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-08-2013, 04:59 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
Quote:
Originally Posted by LATECH View Post
With the solenoid plugged in and the key on, does the solenoid "click" if you manually ground the ground side?
If it works, you need to check the continuity of the ground wire from the device to the ecm.The wire could be broken or corroded in two.If not then the ECM needs verified.
do you have a diagram that shows the pins to he pcm plug? or one that fits my year
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 09-08-2013, 05:11 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
the evr does not make noise if i manually ground it but it does have a little bit of current jumping from my lead to the ground area. so i guess the circuit IS being made if manually ???????
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 09-08-2013, 05:27 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,299
Wiki Edits: 0

Thanks: 220
Thanked 272 Times in 252 Posts
It sounds like it. If you do that with the engine running(vacuum applied) does the evr open the EGR valve ? If not , the windings could be shorted, but still completing the circuit.This would register as an improper load to the ECM, which COULD result in a p1409 as that is a circuit problem.
If that checks out , back to checking the ground path to the ECM
__________________
Fact is stranger than Fiction
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 09-08-2013, 06:02 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
okay, so i put everything back in order, started the truck, let it idle for 2 minutes or so and i manually shorted the ground wire to the throttle body and the bolt holding it on ( ensured i made contact ) and nothing happened...


is it possible theres a fuse that has blown? i honestly donw know what else to look at, im gonna have to be guided with this one....
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 09-08-2013, 06:48 PM
LATECH's Avatar
Hotrodders.com Moderator
 

Last journal entry: Motor - vator
Last photo:
Join Date: Jul 2010
Location: Northeast Pennsylvania
Posts: 5,299
Wiki Edits: 0

Thanks: 220
Thanked 272 Times in 252 Posts
Try another solenoid. Sounds like your "new" solenoid aint so great.
Try another one, retest like you did. See if EGR valve opens like you did , with engine running. The idle speed should slow down and the engine shold falter if valve opens.
I get lots of "new " parts that aint so great.
__________________
Fact is stranger than Fiction
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



All times are GMT -6. The time now is 05:19 AM.


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.