KOEO Test.... Injector Circuit codes
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Dealer wants $189 to run a diagnostic check... I'll call some shops in the area and see if they can run a diagnostic check. Today I disconnected #1 and #3 connectors and put the #1 connector on #3 injector (#3 connector wouldn't reach #1 injector). I ran another KOEO test and got a Circuit Low code for the #3 injector (and #1 which was unplugged).I'm thinking the injector is fine and there is a problem with the wiring harness or the 2 year old FICM module.
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
I was thinking the same thing but when I called the Parts Counter they guy said $100. I'm going to do the FICM test first and see what happens. If I end up at the dealer I'll take the lower quote...lol.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Can anyone explain why a truck will start up just fine warm but will crank for 30 minutes without starting when its cold with one of these Injector Circuit Low codes? Thank you in advance.
Senior User
Joined: Jul 2005
Posts: 139
Likes: 0
From: Henderson, Nevada
I am not an expert but my EX was experiencing an occasional rough idle at times when cold. My FICM (REPLACED IN 08) tested at 22 KOEO then went to 48, once started it stayed at 25 till warmed then would stay around 42-47. I tried the FICM ix this weekend but am not very good at soldering. Didn't change anything so I had to bite the bullet and take it into Ford Country Monday. They diagnosed bad FICM and a bad # 4 glow plug, had that repaired. They kept it overnight and retested then said injectors 123 and 5 show weak and possibly failing. I was told they could fix those injectors, but could risk the others failing due to the pressure change. Quote to repair was about $1900.00. I decided to monitor my injectors as the advisor said bad injectors would result in rough starts and starving from fuel, mainly an issue when cold. I added some REVX to it and so far my starts are extremely quick and the rough idle is gone. I believe the hard start is due to the viscosity of the oil in the HP rail system that runs the injectors, again that is from my limited knowledge.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
I am not an expert but my EX was experiencing an occasional rough idle at times when cold. My FICM (REPLACED IN 08) tested at 22 KOEO then went to 48, once started it stayed at 25 till warmed then would stay around 42-47. I tried the FICM ix this weekend but am not very good at soldering. Didn't change anything so I had to bite the bullet and take it into Ford Country Monday. They diagnosed bad FICM and a bad # 4 glow plug, had that repaired. They kept it overnight and retested then said injectors 123 and 5 show weak and possibly failing. I was told they could fix those injectors, but could risk the others failing due to the pressure change. Quote to repair was about $1900.00. I decided to monitor my injectors as the advisor said bad injectors would result in rough starts and starving from fuel, mainly an issue when cold. I added some REVX to it and so far my starts are extremely quick and the rough idle is gone. I believe the hard start is due to the viscosity of the oil in the HP rail system that runs the injectors, again that is from my limited knowledge.
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Senior User
Joined: Jul 2005
Posts: 139
Likes: 0
From: Henderson, Nevada
I have the scanguageII hooked up but did not pull any codes. When it was at at the dealership they did not advise of any codes either. They did print out a graph which showed the injectors firing, indicating 4 were not as high as the others. To my untrained eye the graph did not look so bad. I was told they were starting to look weak and would eventually need to be replaced. Mainly the problem would surface when it is cold out. Since we are approaching summer I may not have a problem until this winter, but anything is possible. Did you check the voltage on the FICM?
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Well today I had to have my truck towed home....it wouldn't start. While I was in the process of removing the FICM I noticed the back connector which goes to injectors 1,3,5,7 was kind of loose. I kept going and removed the FICM, took it apart and inspected all the solder joints. They all looked perfect and brand new. So I put it all back together and it started right up.... it hadn't ran since 6:00am this morning. For the past week it wouldn't start if it sat that long. The volts were very low since I had cranked it a lot after work so I drove it around for a while. I got quite a bit of smoke for a few miles when I would accelerate, the smoke was light grayish in color. The smoke eventually went away when the truck warmed up and the volts went above 12v. I'll take it for a spin tomorrow and see how it goes.
Senior User
Joined: Jul 2005
Posts: 139
Likes: 0
From: Henderson, Nevada
Was that battery voltage or total FICM voltage? I noticed when I removed my FICM the last connector closest to the firewall was slightly separated. The clip that connects the pin connector to the FICM was in good, but the next clip section below was loose, I popped it back in but it seemed like the plastic had lost its strength back there so the clip wouldn't hold tight. With my new FICM, I haven't had an issue.
Thread Starter
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
The battery voltage was 12v. This morning I went to start it and it won't start. Something I did yesterday with the FICM being taken apart or messing with the wiring harness and connectors made it work. I am going to take it apart again today and see what happens.
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Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Final Update
I had it towed to the dealer this morning. FICM was toast plus one of the connectors on the injector wiring harness was broken... so $1,646.00 later (New FICM and wiring harness) it is fixed and in my driveway. I let the service writer know I was pissed that the FICM failed in just 2 years and 1 month after they replaced it. He said I could go through a process and send a request to Ford to see if they would discount the bill but it would take a couple of days to get a reply... I needed my truck by tomorrow morning so I bit the bullet. I am actually glad I took it to the Dealer... I like Ford Country in Henderson they have always done a great job with my truck. It just costs way to much...lol. Maybe if we all write letters to Ford they will make an extension for the existing wiring harness so we can relocate the FICM to a less lethal spot in the engine compartment. Its just way too hot were it presently resides.
Senior User
Joined: Jul 2005
Posts: 139
Likes: 0
From: Henderson, Nevada
Good thing its fixed. Bummer on the price! Seems like there is no such thing as a simple repair and low costs anymore. I cringe at how much it may cost if something goes down and I can't fix myself!!
When my FICM went out in 08 my truck was still under warranty. Unfortunately it went out about 50 miles east of Ely while Antelope hunting. Managed to get it to the dealer there once it started, but had to wait three days for the FICM to be sent in from Salt Lake. At least you weren't in the middle of nowhere!
When my FICM went out in 08 my truck was still under warranty. Unfortunately it went out about 50 miles east of Ely while Antelope hunting. Managed to get it to the dealer there once it started, but had to wait three days for the FICM to be sent in from Salt Lake. At least you weren't in the middle of nowhere!
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
Glad it is fixed Jonathan. As I mentioned in the PM to you, Gearloose advocated getting an E-series FICM harness - he states it is longer. Not sure where you could mount it though!
For me, I have a spare and carry it on trips.
For me, I have a spare and carry it on trips.