SixOhh
EPA unfriendly
- Joined
- Aug 4, 2008
- Messages
- 1,108
2005 5.9 all stock motor. fresh OEM turbo. no programming that i am aware of.
128k miles.
The problem =
Motor makes a faint but noticeable fueling knock, followed by a small amount of black or grey smoke (un burnt fuel). replaced the FCA with no change. scanner shows it idles at 7k psi and WOT is generally 20k psi under a load and it MIGHT touch 22k at times. when logging the Absolute rail pressure i see a instant drop in RP. literally a negative spike, then its right back to where the pressure should be. it always happens around 1500 rpms +/- 300 rpm's
it had a map sensor code, replaced the sensor and have yet to see a code come back.
here is a video. in the last 5 seconds of the video it does it 3 times in a row and you can hear it and see it very well.
https://www.youtube.com/watch?v=Iq4KhxBsbQg
all injectors ohm out under 1 ohm. i know that is just a solenoid test and i am debating having them tested but i am on the fence weather its sticks or cp3.
the truck takes a little longer to start IMO (im about to load test the batteries) but the starter RPM speed sounds totally healthy. once you get past 2000 rpms i never see a problem and the idle is perfect.
am i loosing an injector or is the CP3 taking a dump on me. my Bosch scanner wont log FCA voltage and my EFI live wont help me on this year.
thanks-
128k miles.
The problem =
Motor makes a faint but noticeable fueling knock, followed by a small amount of black or grey smoke (un burnt fuel). replaced the FCA with no change. scanner shows it idles at 7k psi and WOT is generally 20k psi under a load and it MIGHT touch 22k at times. when logging the Absolute rail pressure i see a instant drop in RP. literally a negative spike, then its right back to where the pressure should be. it always happens around 1500 rpms +/- 300 rpm's
it had a map sensor code, replaced the sensor and have yet to see a code come back.
here is a video. in the last 5 seconds of the video it does it 3 times in a row and you can hear it and see it very well.
https://www.youtube.com/watch?v=Iq4KhxBsbQg
all injectors ohm out under 1 ohm. i know that is just a solenoid test and i am debating having them tested but i am on the fence weather its sticks or cp3.
the truck takes a little longer to start IMO (im about to load test the batteries) but the starter RPM speed sounds totally healthy. once you get past 2000 rpms i never see a problem and the idle is perfect.
am i loosing an injector or is the CP3 taking a dump on me. my Bosch scanner wont log FCA voltage and my EFI live wont help me on this year.
thanks-
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