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2019 GMC Sierra HD Duramax Fuel Rail Pressure P1089
By ahendri,
- P1089
- Fuel Rail Pressure
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Question
mweiss
I want to thank everyone in advance for any responses to this post.
As with a lot of posts I have seen the same or similar issue and I haven't been able to solve my problem
Im hoping I can get a more direct way to go about locating this problem myself.
by providing this detailed info.
The vehicle is hard to start, idles rough, has a horrendous gas smell from the exhaust and the has set
the P0300 on the OBD.
This is the freeze data:
throttle position: 16.11%
RPM: 640
load value: 4.7%
air flow: 12.71 GR/SEC
MAP sensor: 49 KPA
coolant temp: 111 F
short term fuel:
Trim1 3.4%
long Term fuel:
Trim1 0.8%
short term fuel:
Trim2 21.5%
long Term fuel:
Trim2 4.6%
short term fuel:
Trim3 72.9%
long Term fuel:
Trim3 8.5%
short term fuel:
Trim4 86.6%
long Term fuel:
Trim4 92.1 %
fuel system:
1 open
2 open
I have replaced the crank sensor and the plugs. Any help with where the next step should be is greatly appreciated! Again thank you.
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