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Old 01-21-2020, 07:16 AM
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Connor M Connor M is offline
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Default How’s this for FN weird?

Alright riddle me this.

Truck 2 dies while running, won’t restart.
Swap the ficms between trucks 2 and 23.
Both trucks run fine with the other truck’s ficm.

Swap the ficms back between the two trucks and truck 2 won’t start.

23 had a tuned ficm, and truck 2 has an injector dying if that makes a difference.
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2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
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Old 01-21-2020, 07:33 AM
Zeb Zeb is offline
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Is the tuned FICM also a 54 or 58 volt?

I have seen where a stock voltage FICM and injectors with stiction or weak solenoids will barely run, put a hotter FICM on it and they’ll run.
  #3  
Old 01-21-2020, 07:37 AM
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Quote:
Originally Posted by Zeb View Post
Is the tuned FICM also a 54 or 58 volt?

I have seen where a stock voltage FICM and injectors with stiction or weak solenoids will barely run, put a hotter FICM on it and they’ll run.


Nope, afaik it’s a 48 but i can test it real quick.
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2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
  #4  
Old 01-21-2020, 07:53 AM
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Quote:
Originally Posted by Zeb View Post
Is the tuned FICM also a 54 or 58 volt?

I have seen where a stock voltage FICM and injectors with stiction or weak solenoids will barely run, put a hotter FICM on it and they’ll run.


The other ficm shows 48.9 bit the one in the truck shows 47.5
__________________
2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
  #5  
Old 01-21-2020, 08:39 AM
bismic bismic is offline
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Intermittent electrical issue and coincidence?
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Old 01-21-2020, 08:48 AM
Zeb Zeb is offline
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Quote:
Originally Posted by Connor M View Post
The other ficm shows 48.9 bit the one in the truck shows 47.5
Well.......

I’ll relate this experience for whatever it might be worth.

I built a set of injectors for a guy, and he elected not to have new solenoids put on them. 2 weeks after he installed them it started having a dead miss on #7 when it got up to operating temperature.
He pulled all the injectors, sent them back, and I installed new solenoids on all 8 injectors. 2 days after he installed them the 2nd time....miss on #7 when warm. He put a new Motorcraft injector harness.....no change. Miss on #7 as soon as it warmed up.
His son owned my old 6.0. I told him to swap FICM’s and see if the miss stayed with the truck, or the FICM.
Guess what......both trucks ran absolutely fine.....until my old truck chucked #3 rod out the side of the block 8 months later.
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Old 01-21-2020, 08:51 AM
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Quote:
Originally Posted by bismic View Post
Intermittent electrical issue and coincidence?


With the original ficm in it, it will turn over but won’t fire, if you shake the harness it will fire a little bit but won’t actually run

Cranked right up and runs with the other one in it
__________________
2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
  #8  
Old 01-21-2020, 08:54 AM
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Connor M Connor M is offline
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Quote:
Originally Posted by Zeb View Post
Well.......



I’ll relate this experience for whatever it might be worth.



I built a set of injectors for a guy, and he elected not to have new solenoids put on them. 2 weeks after he installed them it started having a dead miss on #7 when it got up to operating temperature.

He pulled all the injectors, sent them back, and I installed new solenoids on all 8 injectors. 2 days after he installed them the 2nd time....miss on #7 when warm. He put a new Motorcraft injector harness.....no change. Miss on #7 as soon as it warmed up.

His son owned my old 6.0. I told him to swap FICM’s and see if the miss stayed with the truck, or the FICM.

Guess what......both trucks ran absolutely fine.....until my old truck chucked #3 rod out the side of the block 8 months later.


Wtf

I want to keep the original fitcm in the truck because the tuned one is mine. I’m gonna figure out what’s wrong with t2, and end with 23’s parts in it.

I’m going to figure out what’s causing the issue and fix it not just leave the ficms swapped
__________________
2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
  #9  
Old 01-21-2020, 11:26 AM
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sootie sootie is offline
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if you find out its a harness or plug issue, ive got a complete 05 6.0 here i would sell parts off if it would help out...

I dont have a ficm though
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Old 01-22-2020, 08:35 AM
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Quote:
Originally Posted by sootie View Post
if you find out its a harness or plug issue, ive got a complete 05 6.0 here i would sell parts off if it would help out...

I dont have a ficm though


I put a third ficm in it and it won’t idle but cranks up and drives alright.
Throws a code for the cps but it’s brand new. Going to try and isolate that and then see what’s up.

It cant be a harness because that ficms been in and out a few time and it won’t run with that ficm. But that ficm runs another truck. Really scratching my head.
__________________
2008 CCSB 6.4 Harley Davidson- PPEI Tuned, EZ Lynk, 4" Jamo Stainless Exhaust, Diet Coke, 35x12.5 Cooper Discoverer STT Pros- Down But Not Out
2008 CCLB 6.4 Lariat Land Yacht- H&S tuned, S&B intake, Diet Coke
2008 EC C&C F450 6.4 Work Truck- Build Loading
2003 RCLB 6.0 XLT- 260,000 miles, no name tunes, stock as can be
6.0 Dump Trucks- 350 and 450
VT365 Rollback
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