will an 18psi carter lift pump be too much pressure for a duramax? i was given the pump is why im asking.
lift pump pressure limit
- Thread starter jason86
- Start date
It will push the regulator open at idle and lope the truck
other than that it will be good for WOT
other than that it will be good for WOT
i don't mind a lope at all. in fact i have a little one wrote into my tune.
is anyone running the carter GP4601HP pump?
guess i am going to run it and probably love it
is anyone running the carter GP4601HP pump?
guess i am going to run it and probably love it
ummmmm....the lope from excessive head pressure is not a good thing....prolly take out a regulator out at some point.
Last edited:
My FICM did start leaking, but the case screws were loose. Cleaned it up and snugged it up and its all good
I dont see how it could effect the FICM
I could easily be wrong as I'm not all that familiar with the workings of the fuel system...but doesn't the FICM use fuel flow to cool the electronics? I was under the impression that the FICM is only designed for a certain psi and 12 psi seemed to be the magic number.
If I am way off, I apologize...
Last edited:
Dont apologize:hug: I have heard the same thing many times,I just dont believe it.
The fuel flows on the outside of the electronics it doesnt actually touch any wires or mix with it. It makes one "U" shaped pass that is formed into the back of the FICM.
I think the deal was excessive psi put tension against the circut board? Yes fuel cools it. But i would like to open a fried FICM to verify how or if PSI can affect it. I doubt fuel actually contacts the circut board. However mine leaking fuel from around the case was a curious deal. I didnt want to open it to find out But tightening the screws stopped it and havent had any issues since. Like said, it does lope at idle but giving mine any throttle drops the psi down some and iirc 8-9 psi at WOT
But tightening the screws stopped it and havent had any issues since. Like said, it does lope at idle but giving mine any throttle drops the psi down some and iirc 8-9 psi at WOT
I'm not sure about actually being hard on the FICM, but an unregulated Holley Black (approx. 15psi) on our '02 made it lope something fierce...Not even close to being tolerable...I agree with Mike, can't be a good thing...
I think the deal was excessive psi put tension against the circut board? Thats possible Yes fuel cools it.Not very well
sounds like while it may not be bad at first, it will end up doing some damage in the long run which is not worth it in my opinion.
Ahhhhh, thanks Simon! Thats an LLY FICM is it not? My LB7 the inlet/outlet are right next to each other on the top. But the insides are prolly the same?
Useing a boost reference would be probably the best way to do it.
Keeping the pressure low when not needed and utilizing the pressure at WOT
That's what I ended up doing on both trucks...Boost activated (Hobbs) switch that turns the pump on at 15psi boost...