10k Resistor mod. does it do anything
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
injection pulse width is the same and I see no reason for it to change.
The PCM will just think that it takes more IPR command "on" to make
the pressure that it desires.
Sean
Happy New Year
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
Idle will not change because idle is maintained by different inputs to the PCM.
I don't know any easier way to explain it.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
The higher pressure is NOT seen by the PCM. That's the purpose of the resistor. Even though the ICP sensor is putting out a slightly higher reading, the reading is reduced by the resistor before it gets to the PCM.
Idle will not change because idle is maintained by different inputs to the PCM.
I don't know any easier way to explain it.
Idle will not change because idle is maintained by different inputs to the PCM.
I don't know any easier way to explain it.
Sean
Happy New Year
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Dang you guys stay up late! 
I don't think this mod will do anything noticeable. The pcm will look at throttle position, rpm, load, gear, and throttle position and set the FPW accordingly. Tricking the high side oil pressure higher will mean the pump is harder to turn so maybe a slight increase in fuel consumption, and the oil will run hotter at the higher pressure.
How many times has someone posted low ICP and been to told to unplug it and see if it starts? On the few that it worked for none posted back "man, the truck runs great now!" If I remember right default is something like 1020psi, so at heavy throttle they would be lying to the pcm just like this mod might do.
I don't think this mod will do anything noticeable. The pcm will look at throttle position, rpm, load, gear, and throttle position and set the FPW accordingly. Tricking the high side oil pressure higher will mean the pump is harder to turn so maybe a slight increase in fuel consumption, and the oil will run hotter at the higher pressure.
How many times has someone posted low ICP and been to told to unplug it and see if it starts? On the few that it worked for none posted back "man, the truck runs great now!" If I remember right default is something like 1020psi, so at heavy throttle they would be lying to the pcm just like this mod might do.
Hotshot
Joined: Apr 2010
Posts: 19,055
Likes: 235
From: Saratoga Springs,UT
We'll Eric mine was. One of the ones that have the ICP sensor go bad I unplugged the ICP from the harness and the truck fired right up if we were to look back at my thread I'm sure I posted the default value
But I never did take it for a ride
I just think this PCM thinks in a way that there are so many checks and balances that just a resister inline with icp sensor may not increase the horsepower like these guys are thinking
What good would higher oil rail pressure be if the fuel pulse width is cut short
But I never did take it for a ride
I just think this PCM thinks in a way that there are so many checks and balances that just a resister inline with icp sensor may not increase the horsepower like these guys are thinking
What good would higher oil rail pressure be if the fuel pulse width is cut short
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