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  #11  
Old 09-23-2019, 07:55 PM
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CTC DEEZUL CTC DEEZUL is offline
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Nah, it would only drop a bank, not individuals. 1,4,6,7 or 2,3,5,8.

This being an international, you need to start at the batteries and check all the power feeds/fuses that are there. Unplug them at every connector from battery post to under chassis, to starter. They love to burn pins out and make ****ty connections.

Also the pins in the relay box themselves are known issues.

It's not uncommon to find wires cut out of the box and a relay hanging outside of the box for the ficm.
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Last edited by CTC DEEZUL; 09-23-2019 at 07:59 PM.
  #12  
Old 09-23-2019, 10:53 PM
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EDIT NEVERMIND. I read it as "06 international"
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  #13  
Old 09-25-2019, 09:23 PM
bens bens is offline
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I decided to check the plugs at the injectors to see if they are being delivered power from the ficm, cylinders 1,3,5,7,8 are all getting power. 2,4,6 are not. I was having my wife cycle the key each time I moved to a different plug, since I was using the meter part of my scanner to do the testing. It is odd because when I plugged the drivers side bank back in they were no longer buzzing when i turn the ignition, but still had good power from the ficm.

I believe the buzzing at key on is to warm up the spool valves, so is it possible that by constantly going key on, they got warm and decided to stop buzzing by the time I got to test 2,4,6? And no longer buzzed when I plugged 1,3,5,7 back in?

Sorry for the long winded post, just trying to be as thorough as possible.

Thanks,

Ben
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  #14  
Old 09-26-2019, 03:17 AM
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FYI (FICM information) to add on to CTCDeezul's post:

C1388B (X-2) Connector: Injector Control, Cyl. 2,3,5,8 (Middle plug)
C1388A (X-1) Connector: Injector Control, Cyl. 1,4,6,7 (end plug)

I believe that the spool valve actuating is temperature dependent (oil temp I believe).

Sounds like a harness issue to me. You need to test each wire IMO - preferably with a substantial electrical load.
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Last edited by bismic; 09-26-2019 at 03:23 AM.
  #15  
Old 09-26-2019, 07:44 PM
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So tonight I retested everything, probing each injector plug for power and ground on each solenoid. 48v going to each solenoid.

This should mean the injectors should be clicking, only injector #8 clicks.

If I have every power at each injector, and they are not clicking, then bad injectors correct?

It just seems odd if they are all bad because he said the truck ran perfect just last week.

I am going to try to get a good injector from a friend tomorrow to plug into each plug just to absolutely verify that everything works.

Thanks,

Ben
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  #16  
Old 09-27-2019, 05:21 AM
bismic bismic is offline
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So you thought 2,4, and 6 weren't getting power, but they are now?

So whose injectors are in the truck? Aftermarket? The only times I have seen most of the injectors bad at one time is with aftermarket injectors.
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  #17  
Old 09-27-2019, 11:05 AM
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They were not on wednesday night, but Thursday night they were. I thought maybe since I ran the key on and off so many times the buzz test at key on quit, not sure why there was no power wednesday and was on Thursday.

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  #18  
Old 09-28-2019, 02:39 AM
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if all is well on the electrical side, remove one of the defective injectors and check the spool valve. It must move easily without hooks (sorry donīt know the right word in english). I have done this here

https://www.youtube.com/watch?v=LrOIT1-EILI&t=13s

(this one is bad)

Greetings from Germany
  #19  
Old 10-02-2019, 11:38 AM
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Got a new injector to test with, all plugs clicked it fine as anticipated. New injectors are on the way.

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  #20  
Old 10-13-2019, 04:17 PM
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Well new injectors fixed the problem. Thanks all for the ideas and suggestions along the way.

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