Misfiring only when warmed up

[Thatstud_darian]

Hey guys I'm new to this forum
Well I have a 2003 ford 6.0

My HPOP blew out on it about a month ago I had it replaced by Powertrain performance down here in Vegas
But when I got it back he showed me and took pictures of how all 8 injectors go crazy and misfire only when you get around 1500 Rpms

I've been getting help from a senior master mechanic from ford and he's been giving me test parts to try and see what it is but still nothing has worked

I've replaced ICP,IPR,FICM, cam shaft sensor, map sensor, oh cant forget all 8 injectors are new,


Wondering if anyone has had this problem, I really need my truck running its been down for almost a month and a half already

[sinner6.0L]

any codes being generated from the PCM?

[kaya@bernhausen]

i take it you've had a fuel pressure gauge on this while the issue occurs as well?
same question, any codes?
a stuck open egr valve can cause multiple cylinder misfires as well

[Thatstud_darian]

Originally Posted by kaya@bernhausen

i take it you've had a fuel pressure gauge on this while the issue occurs as well?
same question, any codes?
a stuck open egr valve can cause multiple cylinder misfires as well

egr has been deleted

and a code keep alive module or something comes up. ill check it when i get home

[toren302]

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[sargar]

Fuel pressure? Air in fuel? I only ask because the original fuel pressure question wasn't answered.

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[kaya@bernhausen]

try disconnecting the icp sensor. see if the problem persists. if it doesn't, it's probably the pigtail