FICM Voltage - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-24-2013, 07:53 PM
Premium Member
 

Join Date: Jan 2012
Location: Fallon, Nv
Posts: 2,397
Thanks: 51
Thanked 9 Times in 8 Posts
Feedback Score: 0 reviews
FICM Voltage

I hate to sound like I'm beating a dead horse, but I haven't been able to find an answer to this particular question: How much is the voltage allowed to fluctuate while driving?

I recently did a DTC and found all 8 injectors showing contribution low. The truck ran GREAT on the 60 mile trip to get to where I was. Cleared the codes, hooked up to the sled, didn't pull so well (I think the error there was in the driver's seat). I rescanned it after the pull and saw 5 & 8 codes. Cleared them again and headed home.

On the way home I OCD observed fluctuations from 46.0v to 49v, hovering in the 47.0v to 48.5volts range. When I got home, the truck sat for about a week, hooked up the SCT and there were no codes.

BPD said that cruise voltage was less important than voltage when the motor is cold directly from the FICM post. Does anyone have any insight here? Am I being OCD? Is the FICM on it's way out? The last one ran fine, threw codes for all cylinders, got hard to start, then didn't start one day. Mike Wood (MDub707) said that my old FICM was a soup sandwich inside when he tcracked it open.

Any input would be appreciated. I'm about ready to just call BPD and put a beating on the VISA for a 6 Phase 54v FICM.

Karl
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-24-2013, 08:44 PM
Premium Member

 

Join Date: Jan 2012
Posts: 1,023
Thanks: 15
Thanked 26 Times in 26 Posts
Feedback Score: 0 reviews
Well mine which is not a Bulletproof FICM actually no idea who worked it over but it only goes to 48.5-50.0 from cold to hot.
Hope that helps somehow

2005 F350 CCLB FX4
Reply With Quote Quick reply to this message
  #3  
Old 08-25-2013, 02:58 AM
N.S.D.Q.
 

Join Date: Oct 2007
Location: Middle VA
Posts: 3,837
Thanks: 5
Thanked 37 Times in 28 Posts
Feedback Score: 3 reviews
Mine will roam from 48.0-49.0 during all modes of driving hot or cold.
Reply With Quote Quick reply to this message
  #4  
Old 08-25-2013, 03:36 AM
Compression Ignition Addict
 

Join Date: Sep 2012
Posts: 2,123
Thanks: 32
Thanked 111 Times in 46 Posts
Feedback Score: 9 reviews
I'd say if its getting that low, it may be on its way out bro... I dont think it should drop past 47.5 when driving
Reply With Quote Quick reply to this message
  #5  
Old 08-25-2013, 05:29 AM
Compression Ignition Addict
 

Join Date: Jul 2012
Location: bel air, maryland
Posts: 1,917
Thanks: 4
Thanked 26 Times in 20 Posts
Feedback Score: 1 reviews
don't worry him bro^ If it doesn't go below 45 he is fine..
Reply With Quote Quick reply to this message
  #6  
Old 08-25-2013, 05:42 AM
Premium Member
 

Join Date: Jan 2012
Location: Fallon, Nv
Posts: 2,397
Thanks: 51
Thanked 9 Times in 8 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by 04cr450 View Post
don't worry him bro^ If it doesn't go below 45 he is fine..
This is what BPD said, however, how long is it between 46v and 44.9v? That's the question.

My last FICM would pop codes, I'd clear them and this went on for awhile. Then it finally puked. Luckily, it was in the front yard and I had the spare.

I still need to pop the cover and do a voltage check. Looks like that will have to wait till Tuesday. I'll report back then.

Thx for the inputs.

Sent from AutoGuide.com Free App
Reply With Quote Quick reply to this message
  #7  
Old 08-25-2013, 06:05 AM
Compression Ignition Addict
 

Join Date: May 2013
Location: Dalton, Ga.
Posts: 893
Thanks: 7
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
mine also does that during idleing or driving. i have noticed it a few times dropping to 46.5v but hen goes back up to 47.5-48v fairly quickly. Doesnt seem to be any harder to start than usual. I guess i will see this winter once it gets cold here, but it usually doesnt get very cold in N. Georgia or Eastern Tennessee where i work. Crossing my fingers, but if it does go out then that just gives me an excuse to get a new one with ATLAS 40 from Bill. LOL.
Reply With Quote Quick reply to this message
  #8  
Old 08-25-2013, 08:04 AM
Compression Ignition Addict
 

Join Date: Jul 2012
Location: bel air, maryland
Posts: 1,917
Thanks: 4
Thanked 26 Times in 20 Posts
Feedback Score: 1 reviews
^that is normal... You will see some fluctuation at the edge cts/cs then if you were measuring voltage AT the ficm connectors.. You would see a more stable voltage reading. If it goes below 45 volts at any time.. I would replace it.
Reply With Quote Quick reply to this message
  #9  
Old 08-25-2013, 09:27 AM
Compression Ignition Addict
 

Join Date: Apr 2011
Location: springville NY
Posts: 2,234
Thanks: 17
Thanked 31 Times in 26 Posts
Feedback Score: 1 reviews
Sounds like the FICM is on its way out. An FICM can show/test 48v and still be bad even tho voltage shows it being good. My reading from the edge CS will range from 48-49.5v
Reply With Quote Quick reply to this message
  #10  
Old 08-25-2013, 10:29 AM
Powerstroke Techie

 

Join Date: Nov 2010
Location: South Fayette/Pittsburgh PA
Posts: 5,114
Thanks: 17
Thanked 65 Times in 59 Posts
Feedback Score: 3 reviews
all 8 circuit low codes and you better get your ficm changed now. don't piss around or your truck is going to leave you stuck.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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.



Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 07:13 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors