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Welcome, I'm Chris (aka Moose).
Graph on tuner shows "line pressure" drops off by 1/3 at the same time. I am not sure but thinking this is fuel line pressure. Are you saying you do not know if you are monitoring fuel pressure on your graph?
When it hangs in gear is this in all gears or just the higher gears?
Key in engine off that reading your monitoring does it register a pressure that way?
If you are not running it at hard throttle just normal driving, does it shift right and not have a power loss?
Current miles and at what mileage did this begin?
Can you check that pressure reading with the key on engine off so I can see if its transmission line pressure or fuel pressure you are monitoring. It looks like transmission line pressure and if that is the case we need to monitor the fuel pressure.
Thanks, ***** ***** were reading it as kpa and now psi, is that correct?
Thanks, ***** ***** engine off there is no transmission line pressure since the engine is not running. So this reading has to be fuel pressure you are monitoring. Engine running fuel pressure should be 350-430 kPa (51-62 psi)
So first off there is something wrong with your reading because your pressure readings are to high. Excessive fuel pressure would be to blame on a faulty fuel pump driver module or fuel pressure sensor.
High fuel pressure though should not cause less power unless it is badly affecting the air fuel ratio.
My suggestion is to try a manual fuel pressure reading with a gauge inline to the injector rail to see if your electronic readings match. If so then I would replace the pressure sensor first off.
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There is not a fuel pressure test port, you have to fabricate an inline T fitting where the fuel line connects to the fuel rail. The fuel pump driver module controls the fuel pressure.
This model shows to not have nor use a pressure sensor. The pressure is regulated by the fuel pump.
I thought the same exact things. I assumed there was a pressure sensor on this year like prior years and other liter engines, though there is not. There is not one on the rail for the injectors nor on the fuel line to them. It simply states the pressure is controlled by the fuel pump. So that means the reading you have been monitoring as line pressure is for the transmission and not the fuel system.
Your weird readings may be coming from a conflict with your scan tool or programmer not correctly communicating with the PCM.
I am going to throw in the towel on this one. Opting out so another can try.