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Early 04 6.0L Slowly Dies After a Minute

520 Views 11 Replies 3 Participants Last post by  bismic
Not sure why my truck is acting up. After it starts it idles ok then starts sounding a little weird. When it dies it sounds like the engine is under a huge load and then slowly dies. There are no codes and after it dies and it wont start back up for about 30 minutes or so.
About 3k miles ago I did a transmission service, air filter and new injectors.
I do have a mild tune and a EGR delete.
Thanks for your time!

Before starting:
ICP 0
Syc 0
IPR 14.8
FMP 45.5
Fuel Pressure 50

Just started:
ICP 1070
Syc 1
IPR 51.1
FMP 47.5
Fuel Pressure 50

When it dies:
ICP 2488
Syc 1
IPR 64.0
FMP 47.0
Fuel Pressure 52
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First thing you need to do is to see if the ICP pressure is actual or inferred.

You assess that by looking at the ICP sensor volts at the same conditions in which you posted the pressure above.

You can just repeat the test and add the ICP sensor volts to the list.
So KOEO the ICV is .11v. When it dies its 2.45.
If I'm thinking correctly the ICV should be .16-.28 with KOEO and I'm at .11 so I have a bad ICP.
I do have an oil leak so I suspect that this may be the cause.
There are several "bubble tests" that you can do. In your other thread, the link for the cranking bubble test was posted. A cranking bubble test is to check for combustion gas being allowed to flow backwards into the fuel rail from a bad injector.:


There are a few other good links on this.

There is also a bubble test that is done with the KOEO, essentially when filling the secondary fuel filter bowl. The fuel pump comes on with the key, but be aware that there is a timer that is in the PCM that will turn off the fuel pump after 15-20 seconds.

The filling bubble test is to check for a leak in the fuel supply suction system (ie pulling air into the system).
EDIT - Contact the place where your injectors were purchased or where they were installed!
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Contact Warren!
Who Warren?
Sorry I'm new here.
Who Warren?
Sorry I'm new here.
Sorry - I apparently got a couple of threads confused with each other. Your issue is with one or more of the "new" injectors and/or with the installation.

EDIT - contact Sinister (since they are the injector supplier)
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It was the #7 injector. I have replaced it and it runs great. Thanks everybody for your help!
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Thank you for posting the source of the issue.
This really helps others when they run a search for the same problem.
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As stated in the other forum, and like above, thanks for posting the conclusion.

Did Sinister accept the return without issue? I am definitely not a fan of Sinister, but if they stand behind the warranty, then that is a big plus.
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