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| 04.5-05 LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect |
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12-06-2012, 07:03 AM
| eBay Motors #1 (permalink) |
| Junior Member  Join Date: May 2010
Posts: 139
| Fuel system losing prime I recently installed a Cat fuel filter & adapter from alligator performance. Since the install, if the truck sits for a few hours, I have to pump the primer on the filter head to get it to start. I'm not leaking any fuel anywhere. Any ideas what could be causing this?
__________________ 2005 2500HD CCSB 4x4 - lbz MP, pcv re-route, egr blocked, 4" DP back straight pipe, 285's on stock aluminums, Insight CTS, bully dog tuner 2000 F-350 CCLB 4x4 - CAI, 4" straight pipe, Edge evolution, Isspro gauges, leveled on 35's 1960 F-250 4x4 |
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12-06-2012, 12:33 PM
| eBay Motors #2 (permalink) |
| DuramaxForum Veteran  Join Date: Jul 2007 Location: ObamaNation-Under the Dictator's rule
Posts: 1,908
| You need to replace the orings in the filter head. Look up the filter head rebuild kit from merchant automotive.... .
__________________ Ham Radio= Global communications without airtime fees My Antenna-SteppIR Si Vis Pacem, Para bellum !!!! ======================== 07' Chevy Silverado HD --CC, SB 4X4 Duramax Diesel/ 6 spd Allison Auto (PTO high idle mod) --EFILive tuning by ...ME with 68MM 4094VA Garrett Powermax Stage 2 Turbo --SILVERLINE 4" Stainless Exhaust, Modded stock Airbox and LIBERATOR Stainless Downpipe --AMSOIL Synthetics and filtration bumper to bumper, including Bypass --DDM tuning HID's in Low and High Beams, 6000K Lows/4250K Highs --PPE rear Diff cover, PPE Deep Trans Pan, PPE High Flow Manifolds and Up Pipes --Danville 3" Y Bridge and big air intake kit / EGR delete |
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12-07-2012, 06:23 AM
| eBay Motors #3 (permalink) |
| Junior Member Join Date: May 2010
Posts: 139
| That was going to be my next question.
__________________ 2005 2500HD CCSB 4x4 - lbz MP, pcv re-route, egr blocked, 4" DP back straight pipe, 285's on stock aluminums, Insight CTS, bully dog tuner 2000 F-350 CCLB 4x4 - CAI, 4" straight pipe, Edge evolution, Isspro gauges, leveled on 35's 1960 F-250 4x4 |
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12-09-2012, 04:51 PM
| eBay Motors #4 (permalink) |
| Junior Member Join Date: Aug 2012
Posts: 35
| same thing happening to me. i'm just wondering WHY after changing to a cat fuel filter it's doing this? |
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12-10-2012, 01:02 PM
| eBay Motors #5 (permalink) |
| Junior Member Join Date: May 2010
Posts: 139
| Update - mine seems to be doing better; hasn't acted up for 2 days. Maybe just took longer to purge all the air out of the 2 micron filter?
__________________ 2005 2500HD CCSB 4x4 - lbz MP, pcv re-route, egr blocked, 4" DP back straight pipe, 285's on stock aluminums, Insight CTS, bully dog tuner 2000 F-350 CCLB 4x4 - CAI, 4" straight pipe, Edge evolution, Isspro gauges, leveled on 35's 1960 F-250 4x4 |
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12-10-2012, 02:07 PM
| eBay Motors #6 (permalink) | |
| Senior Member  Join Date: Oct 2011 Location: Altoona, PA
Posts: 250
| Quote:
__________________ 2005 Silverado LT 3500 SRW CC LB 6" SuperLift, 315/75/16, LBZ MP, EGR Blocked | |
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12-10-2012, 02:20 PM
| eBay Motors #7 (permalink) |
| Junior Member Join Date: Aug 2012
Posts: 35
| lol i'm glad i'm not the only one with this problem! |
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12-10-2012, 06:44 PM
| eBay Motors #8 (permalink) |
| Junior Member Join Date: Apr 2010
Posts: 35
| I just installed the cat filter adapter last weekend and was having the exact same issue with it losing its prime. I ended up putting the stock fuel filter back on (because I don't have time to mess around priming it now) and it has been working flawlessly ever since. So this tells me it can't be the rebuild kit in the filter head. I didn't leave it on long enough to see if it would eventually work. Once I have time I'm going to inspect the orings on the filter adapter and put it back on. I have also read that one other guy had this issue and removing the check ball and spring fixed his problem so I might try this as well. (I don't see any harm in removing it??) if anyone finds a solution to this problem please let me know. As well if I get it figured out ill be sure to post.
__________________ 2010 GMC SIERRA 2500HD BLACK CCSB LMM EFI LIVE W DSP5 FROM IDAHO ROB EDGE INSIGHT CS W PYRO RESONATOR PLUGGED SDP EGR DELETE KIT W LB7 UP PIPE MAGNAFLOW DOWNPIPE MAGNAFLOW 4" STRAIGHT PIPE CAT FILTER ADAPTER |
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12-10-2012, 06:47 PM
| eBay Motors #9 (permalink) |
| DuramaxForum Enthusiast  Join Date: Nov 2010 Location: across the street
Posts: 3,627
| the CAT filter is ALOT bigger than the stocker. priming it can take alot longer than you're used to. lots of places for air in that thing
__________________ CCSB LB7 4x4 |
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12-10-2012, 06:57 PM
| eBay Motors #10 (permalink) |
| Junior Member Join Date: Apr 2010
Posts: 35
| Yeah that makes sense. I just figured after pumping it with the bleed screw open it would be enough. But I'll definitely try pumping it up and leaving it on there for a while. Thanks!
__________________ 2010 GMC SIERRA 2500HD BLACK CCSB LMM EFI LIVE W DSP5 FROM IDAHO ROB EDGE INSIGHT CS W PYRO RESONATOR PLUGGED SDP EGR DELETE KIT W LB7 UP PIPE MAGNAFLOW DOWNPIPE MAGNAFLOW 4" STRAIGHT PIPE CAT FILTER ADAPTER |
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