i got an 03 with a new motor, injectors, and airdog fuel system. the past two days the truck has been low in power and yesturday it started dyin bouyt evert 15 seconds. i put an edge insight on it and it has low rail pressure. i drove it today and was doin good then the same thang, rail pressure dropped to 2k then died. start it back it would run bout 10 secs and die. got it to oriely changed the fuel filter when i left it would build 11k pressure just pullin outa the driveway it didnt take long for the pressure to start dropping and after about 6 miles it wouldnt build over 5k even at WOT. no codes are present. any ideas would be apreciated.
low rail pressure
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the truck has 200k miles on it i just bought it im assuming its the original cp3, idk the exact pressure coming outa the airdog ive gota track down the rite fittings to fit my test guage but i pulled the supply hose from the airdog off the cp3 and turned it on and it had plenty of fuel flow, again i know thats not a concrete test ill try to do a pressure test tomoro
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maybe a bad FCA
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15k psi with fca unplugged either means bad fca or bad pump. is there anyone you know that you can swap fca's with to see if it solves your problem?
re-read post. 5k psi at idle is too low. do a search and check your pressure relief valve to rule that out but i have never seen a leaky valve kill the motor, just lower RP. its sounds like a bad pump.
no white smoke on start up? is your truck "making" oil?
re-read post. 5k psi at idle is too low. do a search and check your pressure relief valve to rule that out but i have never seen a leaky valve kill the motor, just lower RP. its sounds like a bad pump.
no white smoke on start up? is your truck "making" oil?
idk of nebody that i could swap with and no it is not "making" oil. if nethang it is burning just a lil bit. i thout 5k at idle was the standard. i could be wrong i thout i read that on here somewhere. not saying that i dnt have a problem bc clearly i do. ive got an apointment to ake it to the dealership friday morning.
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stealerships are terrible and will cost you alot$$$ is there not a diesel shop around you. i dont want to suggest what you should replace and waste your money but if i was you i would NOT go to the dealership and if your pockets are that deep just go buy a new cp3. if you are confident its not your injectors(do a search on the tell tale signs). i would buy a cp3.......if you are willing to possibly throw away money. i dont know if it was said...any codes?
naw theres no codes and theres rele only one diesel shop in the area that works on pickups and theyve screwed me over before. the dealership im takin it to is in the next county and ive actually heard alota good stuff about them if nothin else ill let them make sure thats wut it is then ill put it in myself.
ive done some research and my truck is not white smoking but my fuel milage has gone down and it does blacksmoke when it wont build pressure. it is not getting fuel in oil. any other signs of injector trouble? i read somewere that to much overflow passed the injector can cause rail pressure to be low how do i check for this? i checked the popoff valve and it had some fuel under the bolt, i dried it and there are no sighns of any more fuel present. took fca off and it rattles so im thinking its good. im starting to learn alot toward a new cp3, and other sugestions
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thats what i think(cp3). the dealership might not be too expensive if you tell them whats going on and want them to check the pump. fuel injector return flow rate is what you want to check. search for it, i cant remember what to do. i think there is a way to check it without a scan tool. if it was my truck i would replace the pump. although i want a pump from shane anyways so either way its not a waste of money. im not telling you what to do, i dont want you to possibly throw away money. bad injector(s) shouldnt cause a problem this bad without the tell tale signs of white smoke, raw diesel smell ect. if crappy injectors were causing the very low RP when your on the throttle you would smell the diesel and probably have a hole in a piston
if you have any future plans on mods like bigger injectors, aggressive tuning etc... get a motorsport pump from shane and dont worry about it ever again. if no mods in the future get a NEW pump, no re-man
if you have any future plans on mods like bigger injectors, aggressive tuning etc... get a motorsport pump from shane and dont worry about it ever again. if no mods in the future get a NEW pump, no re-man
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