LBZ: Pissed
- Thread starter x MadMAX DIESEL
- Start date
We had a lmm shimmed and it would still throw codes. So we ditched that for a Ppe race valve and haven't had a problem since.
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The fuel was excess from install, I checked its not leaking fuel. Never unplugged the regulator as I went to scheid instead.
I unplugged the regulator today and could get around 19,500 psi.. I did port my drivers side fitting to 1/8, and the passangers side 1/16th... When I think back on it I think i ported the wrong fitting... I ported the fittings on the front of each rail, thinking back on it I think I was supposed to port the drivers side inlet, and the outlet on the drivers side. Instead I did the inlet on the passangers... I don't see how in the world that would effect it though? My thoughts are I'm down to a dud cp3 or I somehow, magically, amazingly killed an injector at the very very same time that I installed the enw cp3. I doubt I would have such a coincedence though
But before with the stock cp3 rail pressure followed perfectly commanding 160 with the dvt, just lacked full pressure wot... Now, I can't command more than 120 on the dvt before it starts lacking.
take your injectors out and send them to dynomite diesel... i believe they charge $280 to clean and test your injectors... or you can send them to exergey and have them test them for $400.. I wounder if you have the right fpr for your truck?
maybe your injector(s) is getting worst? I went from trapping a 104 to a 101mph in a months worth of time,as with that my rail got a bit worst...Injectors will be installed,or should be installed today. As soon as i grab my new o rings and copper washers I am going to do atleast the passenger side bank today.If I feel antsy enough,the driver side will be done aswell..
I'm not going to send the Injectors to anyone without having a set to swap in. I use this truck for work. And will really suck when I pay 300 to get a return test done and yet check out fine. Like I said right before I swapped cp3s it would hold rail pressure fine.. Does that really sound like an injector?
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Does Floor It modd the FPR or leave it stock? sounds like the FPR isnt allowing max pressure if your topping out at 120mPa commanded at idle.
But I unplugged the regulator.. meaning that the pump was running wide open, should ramp up to 29,000+ psi. So that ruled out the regulator
Yes its a modded regulator
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you said it only hit 19.5 hereif you unplugged the reg at idle and it didnt hit 26-29k then its very very possible you have a sticking regulator that isnt fully opening
We have been following this thread for to long , please call David , and he can help you with any problems your are having with the truck and or cp3. We wanna help , we just need you to call us so we can discuss your problems. Thanks Trey
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- Built motor , duel fuelers , 60's overs , gtx4202r
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- Built motor , duel fuelers , 60's overs , gtx4202r
I thought if it didn't ramp up all the way with the regulator unplugged it would tell you that the regulator is not the problem? That something else is going wrong... maybe I'm dead wrong. Yes I have been in contact with john on a regular basis, he is a nice guy offering to send me a brand new pump to try out. Refered me to a local puller to help me with a return rate test or the like.
I will call Dave too if and see if he has anymore ideas. Dave was very helpful pushing to get my pump to me in time, and trying to diagnose the problem. Though it hasn't been figured out yet, obviously.. Not that I don't want help from dts, but truth be told I need someone in person to help me rather than just talking about it on the phone, unless its just ruling out things or something like that. But Johns been very nice and seems like I should stay in contact with mostly, just because he knows alot more than anyone else what kind of problems could be going on that could cause this. I am still open to more ideas though of he has any I can call. That goes to the forum too I'm still open to weird ideas, and thanks so far to everyone posting up trying to figure it out with me.
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I will call Dave too if and see if he has anymore ideas. Dave was very helpful pushing to get my pump to me in time, and trying to diagnose the problem. Though it hasn't been figured out yet, obviously.. Not that I don't want help from dts, but truth be told I need someone in person to help me rather than just talking about it on the phone, unless its just ruling out things or something like that. But Johns been very nice and seems like I should stay in contact with mostly, just because he knows alot more than anyone else what kind of problems could be going on that could cause this. I am still open to more ideas though of he has any I can call. That goes to the forum too I'm still open to weird ideas, and thanks so far to everyone posting up trying to figure it out with me.
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If it is a sticking regulator is there something I can do at home to fix it?
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yes its wrong
. if you unplug it and it doesnt go to full pressure at idle its one of three things. FPR or CP3 or Injector/s. Since you have a new pump (we assume) and you say your return rates are good yet you unplug the FPR and pressure does not reach 26-29k, i would point fingers at a sticking FPR. if they are not cleaned and/or de-burred very well to keep from scratching the slide or hanging up after its "modded" it will cause issues like this. If you unplugged the reg and it went to 26-29k at idle yet you couldnt do it with the DVT, id say you have electrical/tuning issues but thats not the case. i would be pulling the FPR and replacing it with a new one or known good one (and double check you know for sure that used one is good before puttin it in your truck)