2003 cummins hard starting when warm

toms73cuda · 08-22-2008, 11:54 PM

2003 3500 starts great when it cold meaning over night . but after it warms up and i drive it for a while it cranks forever before it starts. I thought the problem was my max mileage module so i unplugged it still does the same thing .
Thank you .

**SOUTHERN SMOKE** · 08-23-2008, 12:20 AM

sounds like your lp is starting to die my friend, hate to say that, but they will go out, and are very prone to failure on the 2003-early 2004 models because they are mounted on the back of the fuel filter canister.....

__________________
CLICK---> GEORGIA CUMMINS CREW 2003 CTD SMOKIN' BLACK BEAUTY... QCSB 4x4 6-SPD...AUTOMETER BOOST, FUEL, OIL...2ND GEN 24V INTAKE HORN...EDGE J/A... B&W TURN-OVER... QUADZILLA R/P...RECON L.E.D. RUNNING LIGHTS... RECON LINE OF FIRE...33X12.50 COOPERS...SRT-10 HOOD...XM RADIO...THEY CALL ME SMOKEY...

toms73cuda · 08-23-2008, 06:54 PM

what is an lp? today i changed my fuel filter and the truck starts right up. but i just changed it about 3k miles ago must just be bad fuel in portland (safeway)

styler007 · 08-24-2008, 11:28 AM

That's exactly what happened to mine when my Lift Pump went. Thankfully under warranty. They put the retrofit lp in my fuel tank. Too bad I'd just filled up to leave town that day!

Get it fixed (warranty??) before you get stuck.

__________________
2003 5.9L Cummins 2500HD 4x4 - Predator, Bull Bar w/Fogs, Line-X, Reese 5th Hitch, Back Rack, Viper
WTB: lift, exhaust

08-22-2008, 11:54 PM	#1 (permalink)
toms73cuda Newbie Join Date: Apr 2008 Posts: 3 toms73cuda's Truck Pics	2003 cummins hard starting when warm 2003 3500 starts great when it cold meaning over night . but after it warms up and i drive it for a while it cranks forever before it starts. I thought the problem was my max mileage module so i unplugged it still does the same thing . Thank you .

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08-23-2008, 12:20 AM	#2 (permalink)
SOUTHERN SMOKE GA CUMMINS CREW PREZ Join Date: Dec 2007 Location: ROYSTON, GEORGIA Posts: 1,691 SOUTHERN SMOKE's Truck Pics	sounds like your lp is starting to die my friend, hate to say that, but they will go out, and are very prone to failure on the 2003-early 2004 models because they are mounted on the back of the fuel filter canister..... __________________ CLICK---> GEORGIA CUMMINS CREW 2003 CTD SMOKIN' BLACK BEAUTY... QCSB 4x4 6-SPD...AUTOMETER BOOST, FUEL, OIL...2ND GEN 24V INTAKE HORN...EDGE J/A... B&W TURN-OVER... QUADZILLA R/P...RECON L.E.D. RUNNING LIGHTS... RECON LINE OF FIRE...33X12.50 COOPERS...SRT-10 HOOD...XM RADIO...THEY CALL ME SMOKEY...

08-23-2008, 06:54 PM	#3 (permalink)
toms73cuda Newbie Join Date: Apr 2008 Posts: 3 toms73cuda's Truck Pics	what is an lp? today i changed my fuel filter and the truck starts right up. but i just changed it about 3k miles ago must just be bad fuel in portland (safeway)

08-24-2008, 11:28 AM	#4 (permalink)
styler007 Cummins Fan Join Date: Jun 2007 Location: Gillam, MB - North of 56* Posts: 68 styler007's Truck Pics	That's exactly what happened to mine when my Lift Pump went. Thankfully under warranty. They put the retrofit lp in my fuel tank. Too bad I'd just filled up to leave town that day! Get it fixed (warranty??) before you get stuck. __________________ 2003 5.9L Cummins 2500HD 4x4 - Predator, Bull Bar w/Fogs, Line-X, Reese 5th Hitch, Back Rack, Viper WTB: lift, exhaust