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07-24-2017, 09:43 AM
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#1
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Name: K80
Title: Too Much Time
Status: Not Here
Join Date: Jun 2011
Location: PA
Member`s Gallery
Posts: 490
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Spit and sputter at 17k RP
This thing is doing weird things that I can't put my finger on what to replace/look at. At 17k rail pressure and 17-1800 rpm ish it will spit, sputter and do that kind of neat things. At low rpm and past 17k it fuels and runs fine. I was thinking fuel leak and maybe something related there. I went over all of the lines and nothing was loose.
The other strange part of this is that I think my Airdog is getting a bit tired. At startup it's at 15psi. After about 30 minutes of driving it drops to 9 but stays there. When it drops to around 9, the sputtering does not completely go away but gets better.
I went over the lines and swapped FCA's between the pumps with no notable difference. Anyone have any ideas or direction to look?
__________________
Justin
06 QCSB, G-56, EFI LIVE, E.D.63/68/14/E.D.S475, FLUX 4's Evil twins over FI stg3
Built With Blood
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07-24-2017, 09:48 AM
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#2
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Name: maxwedgehead
Title: Too Much Time
Status: Not Here
Join Date: Nov 2010
Location: West Plains, MO
Member`s Gallery
Posts: 850
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Who tunes it? Have you checked to make sure you don't have any odd cell causing it to only do this under specific conditions?
__________________
15 Mega Cab Dually
03 RCSB 1500 12 valve 215 pump, built 47re, 5x18s, 4k gsk, sxe369, Fass 240, 7mm delivery valves, 11.71 
08 RCSB 1500 06 CR built 48re, Compounds, 200% over, 12mm, Billet rod motor, etc..
2009 CCSB 6.7L
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07-24-2017, 10:28 AM
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#3
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Name: K80
Title: Too Much Time
Status: Not Here
Join Date: Jun 2011
Location: PA
Member`s Gallery
Posts: 490
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Quote:
Originally Posted by maxwedgehead
Who tunes it? Have you checked to make sure you don't have any odd cell causing it to only do this under specific conditions?
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Silverbullet and no I didn't plug it in. I figured EFI isn't going to tell me much more than I can see with gauges. That might be next though. Plop a stock tune in it/check return rates ect.
__________________
Justin
06 QCSB, G-56, EFI LIVE, E.D.63/68/14/E.D.S475, FLUX 4's Evil twins over FI stg3
Built With Blood
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07-24-2017, 12:09 PM
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#4
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Name: maxwedgehead
Title: Too Much Time
Status: Not Here
Join Date: Nov 2010
Location: West Plains, MO
Member`s Gallery
Posts: 850
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Quote:
Originally Posted by K80
Silverbullet and no I didn't plug it in. I figured EFI isn't going to tell me much more than I can see with gauges. That might be next though. Plop a stock tune in it/check return rates ect.
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Thats what I would do. Stock tune and see if it still has the issue.
__________________
15 Mega Cab Dually
03 RCSB 1500 12 valve 215 pump, built 47re, 5x18s, 4k gsk, sxe369, Fass 240, 7mm delivery valves, 11.71
08 RCSB 1500 06 CR built 48re, Compounds, 200% over, 12mm, Billet rod motor, etc..
2009 CCSB 6.7L
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07-29-2017, 10:28 AM
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#5
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Name: SixOhh
Title: EPA unfriendly
Status: Not Here
Join Date: Aug 2008
Location: Magnolia, TX
Member`s Gallery
Posts: 1,108
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Quote:
Originally Posted by K80
Silverbullet and no I didn't plug it in. I figured EFI isn't going to tell me much more than I can see with gauges. That might be next though. Plop a stock tune in it/check return rates ect.
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umm EFI will tell you EVERYTHING. log it during the sputter. see if its RP or FCA or what.....
__________________
07' Silver 2500 5.9 4x4 LWB
Goerend 48re-csp5/EFI- T&C Mild Cp3-F1 Apex 7.5 -S369sxe Amsoil
Coolant Bypass -Airdog-D&J- Hamilton 188/220 -AFE-ARP Opti-Lube
H-Town Off-Road
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08-08-2017, 02:47 PM
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#6
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Name: K80
Title: Too Much Time
Status: Not Here
Join Date: Jun 2011
Location: PA
Member`s Gallery
Posts: 490
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Little update... The truck sat for a couple weeks for some hitch work, swapping new wheels and tires and an oil change. After all this and driving it home 45 minutes the damn thing doesn't sputter, fart or huccup at all. Almost like all it needed was a break. I have no idea how this happened and don't want to jinx it either. I swear this thing is possessed.
__________________
Justin
06 QCSB, G-56, EFI LIVE, E.D.63/68/14/E.D.S475, FLUX 4's Evil twins over FI stg3
Built With Blood
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