Also wanted to add it's been sitting for roughly 2months while I tried to figure out the problem.

It takes a long while to get it started and if it does it kind of slowly goes in to it. Max rpm I can get it at idle is roughly 3000rpm. And it's bucking and missing most of the way there. Sounds as it's missing 4injectors and the power output greatly reflects it. Compression is good not at all worried there. New icp & IPR they all checkout. rotella t6 bout 600miles ago and all maintenance done regularly. Again any help would be greatly appreciated.

 

Having a dilemma here. One day "Early 04" 6.0l is running fine. Next morning starts up quick as usual few minutes into warming up. If I remember correctly it bucks and makes a " tack tack tack tack" sound. I instantly check cts edge for codes and it pulls low circuit on 1,4,6,7 injectors. It lacked major power as if it were really running off only 4cylinders literally had to pop it in low build boost to move it off a very slight incline.

There is NO TUNES stock since day one.

Rotella t6 every 2500 miles.

Motorcraft filters all around

Blue spring upgrade

Egr delete

6months ago got new interstate batteries. Previous batteries were Walmart garbage.

Also prior to this problem ficm voltage was reading 46-47 koeo and same during startup. It takes a long time to get it started when it does start it sounds a lot quieter than it suppose to again like its only running on 4injectors and still no power at all barley enough to pull itself. I've replaced the ficm/injector wire harness and the power side of the ficm I guess it's called with a dorman circuit board that's has the four pins now I get 48-49 volts but still no change.

I'm stuck here and need HELP I can't afford to keep throwing money at it and my truck has been sitting for couple months now.

Any help would be appreciated.

 

I seriously doubt that you lost four injectors. ...especially since those exact four injectors are fed by the same connector on the FICM harness.

Check your FICM connectors with an emphasis on X1. It is the outer small connector. You can see it on the cover of this document.

https://swampsdiesel.com/files/Fordficm.pdf

If the connections are fine, it may be a FICM power board issue. We'll see.

__________________
Edited to add...

I'll add here that - IIRC - one of the downsides of 4-pin FICMs is that they can't differentiate in a code sense a short to ground of any one injector in a bank of four. As such, in addition to checking the FICM connectors, you would do well to check along the FICM harness for chafing.

http://www.powerstroke.org/forum/6-0-motor-problems/1096562-6-0-harness-chafing.html

Second point... I just noticed that this is my 4000th post. Wow. ...and only 8 million more and I'll be up with @ZMANN... Dare to dream...

 

Second point... I just noticed that this is my 4000th post. Wow. ...and only 8 million more and I'll be up with @ZMANN... Dare to dream...

Never going to happen!

Edited to add.

not if you keep editing posts to insert more info vs creating new posts

 

check your FICM connections, if they are good that Dorman board probably ate it...

 

I would agree with the others that your x1 connector is probably loose. They are plastic and sit right near a hot exhaust manifold so can become brittle over time. Be careful with them to avoid breaking the keeper tabs that keep them seated to the FICM. Also wanted to mention that you can very likely double your oil change interval to 5k miles. Not sure why you are changing at 2500 miles.

 

^this little gem is why Scott has eleventy billion posts. Never mind that he didn't offer any help to the OP about his FICM issue. oke

 

Never mind that he didn't offer any help to the OP about his FICM issue.

Fine


try a loaner full FICM

 

He just got one more post out of that. We got played.

 

 

Thanks man I greatly appreciate it and I just had a mechanic buddy stopped by we opened the pick them up and can't find any visible microscopic wires or grounds that are severed and check the voltage is staying 47 so I'm still going to send it off because I don't know where to go from here. It freaking sucks not knowing what the **** could have happened

 

I would call one of those places first. They may know of an easy test or two to do.

 

Did you ever figure out what the issue was? I’m having the exact same problem with mine currently.

 

You have plenty of good advice in this thread to decide how to proceed. One persons fix may not be the same as another's. Check the FICM connections and the harness. If you don't find anything, then send in the FICM.

Always 2 choices:

1. Test and inspect (and this case, testing MAY include sending in the FICM (if you do not find a connector or harness issue).
2. Throw money at it.

 

.

 

Don't rule out a harness issue. Sometimes the connectors (from heat) break at the connector lock and the plugs do not stay seated. We know all about that on the forums and there are several ways to deal with it of that is what you encounter.

With your codes: C1388A (X-1) Connector: Injector Control, Cyl. 1,4,6,7 (end plug, nearest the firewall).

The 48V test is a good test for the Power Board, but does not test the logic board in any way. The FICM consists of a power board and a logic board. Earlier I posted the ONLY two companies that I know of that test the logic board. Even if it DID pass the buzz test on all injectors, the buzz test simply does not COMPLETELY test the logic board.

Having access to a known good FICM is the best answer IMO. Most people do not have that option.

I bet a known good FICM will fix you up. Then you can get your FICM repaired at either of the two companies mentioned previously. The repair includes needed internal upgrades. Better tan buying another FICM from ANYWHERE.

As an FYI - the CTS3 is VERY nice for monitoring most PIDs, but a few it doesn't get correctly (not really applicable with your issue now though), AND it is not the most thorough code reader. The SCT is worse at both. If you really get into a pronem that is difficult, ForScan is best and only about $40. Just a thing to remember if needed in the future.

 

Plugged the good ficm in ran like a top, the warranty just ran out on the ficm last month, sending it out to Circuit board medics today.

 

These are the straightforward ones to help with. Glad you are getting it done.