6.0l driving me up a wall please help

rustygold

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Well clean it out got some debris screen looked ok but replaced it anyway.
Still no start

New development ficm no voltage/ no sync to computer.

Icp 1500 matches desired psi
Irp 42%

So I'm going to check wire harness make sure I don't have an open the if it's good pcm change

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Dsl_Dog_Treat

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Make sure Ficm Harness connectors are all snap locked in firmly and ground wire attached to manifold stud. Sounds like the main FICM harness isn't totally connected.
 

rustygold

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It is got to looking some on the pins was backed down in there a little bit I'm thinking the ficm had an intermediate problem from connection. Wire get hot looses voltage.

Now my only thing I couldn't find do a 7 pin ficm computer be swapped to a 4 pin ficm.

I know the boards are not but what about the whole system

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Dsl_Dog_Treat

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All of the replacement FICM's are 4 pin. But if you've replaced yours, the PCM needs to be flashed to sync with the FICM.
 

rustygold

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She's alive she's alive idle at a good 800 to 900 at 25%

I have to scanner on it recorded so if it shuts down I can see what drop out first

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rustygold

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Now at operating temperature
Icp 630 matching desired
Irp 25%

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rustygold

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Lost FICM synchronization
Icp was 630 psi down to 25 psi
Irp 25% to 40% to try to kep it running I'm think the synchronization drop and shut down injectors

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rustygold

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P0603 code is showing up now
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rustygold

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Nope plain Jane I'm going to pop the ficm relay if no sync the going to cam and crank sensor

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Dsl_Dog_Treat

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OK good deal.
Ipr duty cycle is just about twice as high as what it should be at operating temp idle, but I think we need focus on why the PCM popped a 0603 while it was running.
 
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