Fueling issues.

[minerigger]

Ok so here is the story. Truck is an 06 LBZ. Has Suncoast trans with 1058. EPR 366 with HSP 3" bridge and tube, stock injectors, AirDog2 165, factory filter head, EGR delete, PCV reroute, EFILive by Kory, 5" turbo back exhaust.

The truck on Dec. 1, 2013 overheated the trans to 280*, I limped the truck 75 miles with trailer in tow to within 30 miles of home when she stopped shifting. I pulled over and called a tow. Fast forward 2 months and the truck had the trans pulled. Trans was rebuilt by myself using suncoast parts and got a 1058 converter. The stock turbo was removed and a EPR 366 kit put in with a bw s366. 66 comp, 80 turbine, .91 a/r on a t4. I installed the transmission on April 12, 2014. Turbo was installed on April 16, 2014. I got the truck started April 17, 2014 and had a small issue with the valve body. Thanks to a member on here we got it all squared away and the transmission was happy and no codes.

So go to take it for a drive and it threw a P0101 code and I also noticed that I could not get fuel past 15k and it was more or less cutting fuel at 1600 rpm and slowly getting up to 1900rpm. Back off the throttle a touch and it would shift nice and smooth. So I checked the size of the intake and it was slightly smaller at 3.8". Kory tweaked the tune and code goes away but the truck still wont fuel.

I have cleaned the MAF sensor, tried to flip it around (ya never know how something small could bite you in the ass) but it will only go in one direction...diodes towards filter. I have changed all 3 fuel filters after maybe 20 miles on them. I have unplugged the FPR and started the truck only to achieve 15k rail psi and then truck sounds like its against a rev limiter. I did the bottle test this morning and I gave her all she would try for and got nothing in the bottle.

When I go WOT it will jump rail pressure to 18k psi and rpm to 2100 and then fall on its face. Rail goes to 13k and rpm to 1600 and acts like its stuck in gear.

I have sent multiple logs to Kory and he being the awesome guy that he is has sent me 4 different tunes to try, none of which seem to be fixing the fueling.

Im lost now at what else to try so I humbly ask for assistance. Thank you in advance.

 

[x MadMAX DIESEL]

Sounds like you need a new cp3. It should make full pressure regardless of injection amount, while not regulated. Like idling fuel quantity atleast I mean, or you have a massive fuel blockage somewhere.

 

[minerigger]

Can it go bad after sitting for 4.5 months? It did fine the day the trans gave up. Its all kinds of shitty. I do have stock lines from airdog to the stock filter head and the 2 short lines from filter head to hardlines prior to cp3

 

[x MadMAX DIESEL]

Idk, diesel USA groups will charge 200 bucks to open inspect clean and test a cp3. You got good fuel pressure from your airdog?

 

[minerigger]

Idk, diesel USA groups will charge 200 bucks to open inspect clean and test a cp3. You got good fuel pressure from your airdog?

Cant honestly answer that. I don't have a way to check pressure at the airdog, at the filter head or at the test port. But it would be hard to test it at the port prior to cp3...my HSP intercooler pipe is like 1/8" off of it.

 

[x MadMAX DIESEL]

Can you hear it run? I've had a lift pump die before that wasnt very free flowing when not running. Would hardly get over 2000rpms when driving.

 

[minerigger]

I have it hooked up to power on with ignition on. I can hear the pump running when I have ignition on motor off. Also since I just replaced the 3 filters, I cracked the bleed screw and had the gf turn ignition on and the airdog primed itself and the filter head. So im guessing its after the factory head. So like you said either CP3, FPR, or FPRV...maybe do all 3

 

[x MadMAX DIESEL]

If you didn't get anything in that bottle your fprv is fine. Fca I wouldn't suspect, it's either starving for fuel after filter (which is unlikely) or your cp3 is bad. I hate to tell someone what there problem is, since I could be wrong. But I'm betting on it being a bad cp3

 

[minerigger]

To be honest I am to. Its the last thing in the fuel system that I haven't tested. Ill have to ask Kory if it was commanding 26k at the rail on WOT, if so then im starting to lean more towards the cp3 being bad.

 

[x MadMAX DIESEL]

idling will be the easiest time a injection pump can make full pressure. Cause its just building pressure "freely". It doesnt have to worry about the sticks injecting large amounts of fuel, and keep the pressure up at the same time. If it can't make full pressure without a blink of the eye theres something wrong. When you unplugged the fca it defaulted to WFO.

 

[minerigger]

I didn't log it when I unplugged it. I sure can try that tomorrow though. I looked at my logs I did from last night and the night before and the most commanded rail pressure I saw was 20107 psi and actual was 21684.63 psi. I haven't tried to disconnect the batteries either. think that is worth a shot? What is fca and WFO?

 

[x MadMAX DIESEL]

so driving you get good rail pressure, but when you sit with it unplugged it only makes 15k??? Somethings not adding up. fca and regulator are the same thing. WFO wide ****in open

 

[minerigger]

When driving it makes good rail pressure, as per what the data logs say. I have a manual PPE gauge. When I get to 1600 rpm the gauge is around 15k and drops to 13k and slowly the truck gets its fat ass up to 1900 rpm and it will shift.

Now when I go WFO rpms jump to just over 2000 as per the data log. But when it does that it feels like it hits a wall and all the fuel is cut off. Its weird. Kory hasn't said anything about a bad cp3 or fpr or anything. I think this wh*** has him slightly puzzled, I know it has me baffled as hell

 

[minerigger]

Looking at all of my logs when im at 1900rpm and above my commanded and actual are within 50psi of one another at 11k

 

[x MadMAX DIESEL]

I would unlpug it tomorrow and see what kinda pressure it makes. It oughta make alot effortlessly. Does it smoke alot, could have an injector sticking open causing low pressure. Bad injector codes are less likely to pop up then low rail pressure codes. Which I'm kinda suprised you haven't had that yet. When you feel it "hit the wall" shortly after after trying to floor it through that little dead spot would be a common time for it to throw a low rail pressure code. Let us know what psi it makes tomorrow idling unplugged. If you have full efi live, this would be a good oppurtunity to get familiar with the DVT functions.

 

[x MadMAX DIESEL]

Looking at all of my logs when im at 1900rpm and above my commanded and actual are within 50psi of one another at 11k

Didn't see that. Sounding like something else limiting you besides hard parts... Still not a bad idea to unplug it and see what it does

 

[minerigger]

By full EFILive what do you mean? Ive got both updated versions downloaded to the ol laptop and have an autocal. It did smoke earlier when it was unplugged but not bad...sounded terrible though. when I shut her down I had a tiny bit of white smoke. But holy crap does it smell like raw fuel. Yea ive had no low rail pressure codes as of yet...also how long can/should I leave it unplugged and at idle. I know it took the pressure up quick but the rpms went with it, or it sure sounded like they did.

 

[minerigger]

Hell ill go do it now, I aint scare of a little darkness

 

[Porno Joe]

By full EFILive what do you mean? Ive got both updated versions downloaded to the ol laptop and have an autocal. It did smoke earlier when it was unplugged but not bad...sounded terrible though. when I shut her down I had a tiny bit of white smoke. But holy crap does it smell like raw fuel. Yea ive had no low rail pressure codes as of yet...also how long can/should I leave it unplugged and at idle. I know it took the pressure up quick but the rpms went with it, or it sure sounded like they did.

I could be totally wrong but didnt someone else have an issue recently with the fuel temp sensor limiting the desired fuel pressure?

Also the last time i unplugged my FPR, i just unplugged it and started the truck up and it immediately pegged my rail pressure gauge.

 

[minerigger]

I could be totally wrong but didnt someone else have an issue recently with the fuel temp sensor limiting the desired fuel pressure?

Also the last time i unplugged my FPR, i just unplugged it and started the truck up and it immediately pegged my rail pressure gauge.

Yea I read that also Joe. I unplugged the fpr and it only jumped to 15. IMA try it again tonight and see if the bitch will go to 26k

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