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Old 05-13-2017, 03:21 PM   #1
Penn6.7

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High Rail Pressure at Idle

Just finished building a new engine. 6.7 running 04 electronics, 400% over Injectors, stock LBZ pump over a 12mm 6.7 pump using ATS Controller. Belt on running I'm at max rail, take belt off rail is at demand psi. Replaced pump, FCA and 3 ATS controllers. No improvement. I'm lost. Tested FCA circuit from the ECM and its fine, checked continuity and the wires are good. Certainly it can't be another controller but I have no idea at this point.
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Old 05-13-2017, 03:52 PM   #2
blackmega3500

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ats has a reputation......
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Old 05-13-2017, 04:06 PM   #3
Penn6.7

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That's what I've been hearing.
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Old 05-13-2017, 04:45 PM   #4
Penn6.7

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It's a 6.7 in an 2004 to clear my description up
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Old 05-13-2017, 05:29 PM   #5
Poulina
 
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ATS has a reputation of what? I've got nothing bad to say about my ats controller. It does make the truck cough on startup for no apparent reason I will say.
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Old 05-13-2017, 06:20 PM   #6
blackmega3500

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Quote:
Originally Posted by Poulina View Post
ATS has a reputation of what? I've got nothing bad to say about my ats controller. It does make the truck cough on startup for no apparent reason I will say.
ATS controllers are known to brick easily.... That's always been the case.
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Old 05-14-2017, 08:20 PM   #7
Penn6.7

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Fixed.
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Old 05-14-2017, 08:59 PM   #8
Howling
 
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Issue?

Sent from my SCH-I545 using Tapatalk
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Eric

2006 Dodge CTD/48re 4x4 Sport
With some fuel and air.
Bullseye,Hamilton,Exergy,EFI,ATS,FASS,HTS,Thuren, Toyo's...

1996 2500 RC 4x4 CTD-63/68/.83,5X.014,180 maxed Ppump,Fass...
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Old 05-14-2017, 09:03 PM   #9
blackmega3500

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Originally Posted by Howling View Post
Issue?

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Right! Lol....


Possibly the most open ended thread endings ever lol
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Old 05-19-2017, 10:54 PM   #10
ctd>therest

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How much lift pump pressure do you have? Does it do it when warm? Take the fuse off the lift pump and let it idle. I have a ppe kit my lift pump would make 18psi. My lbz pump would hate it. It would idle at 29k at the rail. But as soon as I take the fuse off the pump. It would go to normal idle pressure.
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Old 05-19-2017, 10:55 PM   #11
ctd>therest

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I went from a ppe to a fish controller it would do the same. I changed the fca from the dmax one to a cummins one didn't help. Until I lowered lift pump pressure to 12psi.
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2006 cclb 4x4 some goodies 8.48@82.50mph
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Old 06-26-2017, 09:08 AM   #12
Penn6.7

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Sorry for the open ended response. The first pump I had was trashed, replaced the pump, new pump had a bad FCA out of the box which didn't help the troubleshooting process. Replaced FCA and most of the problems went away. Once pressure was under control it was found that the return to tank line was too small for the larger dual pumps. Return size increase and rail returned to normal pressure.
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Old 06-27-2017, 07:39 PM   #13
Jyd302bjj

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My ats controller was bad out if the box truck would go to max rail pressure
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