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post #1 of 8 Old 01-18-2013, 08:16 AM Thread Starter
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runs bad when cold

hey guys i know this has been brought up multiple times but hard to read through everything and get all answers.. so here it goes

noticed truck would idle really rough off and on during cold starts and smooth out and then started running kinda bad until up to operating temperatures and now its horrible... barely gets up to speed until warms all the way up...

checked the FICM and putting out 48v key on and 47.7 running

did a buzz test on injectors and no codes came back..

what else could be causing this problem..

seems like losing fuel til warms up

thanks in advance

adam

2005 F250 cc sb lariat fx4
MBRP 4" Turbo Back Straight Pipe
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post #2 of 8 Old 01-18-2013, 09:20 AM
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So you must have a diagnostic tool like AE to do the buzz test. What did the balance/contribution show for the cylinders? If you didn't that test, you really need to. BTW, it doesn't always have to throw codes to be a bad injector. Your description sounds like one injector is sticking open.

Frank
2007 F-250 Lariat Crew. MBM 190/50s,
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Stiction Problems - Fix it yourself! - http://www.powerstroke.org/forum/gen...ml#post4509754
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post #3 of 8 Old 01-18-2013, 09:49 AM
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I got some sticky injectors on cold start as well. Runs like s*&t until it gets some heat into it. NO CODES. Was also wondering how to figure out what one/ones it is. They all pass a multimeter test.

On another side when i went to 5w40 delo synthetic it took my rough cold start from 10 minutes to around 5. After about a month of driving. Sticky spool valve I know its a band aid but it helped.

2003 F350 DRW 7.3 6 speed. 4 inch lift, 35x12.50's Goodyear Dura Trac all around, steel 2 inch dually spacer rear. southbend clutch, Dp tuner high idle 60t 80 econ 120 race 140 extreme, afe stage2 intake, pdr super gtp turbo, pdr up pipes, non ebpv pedestal, DIY regulated return, fuel bowl delete, in tank mods, pac brake pxrb,6.0L Intercooler, Terminator T500 HPOP, 6 inch miter cut stacks . KW mud flaps w/custom mounts.
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post #4 of 8 Old 01-18-2013, 10:56 AM Thread Starter
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Yea i had it on a diagnostic tool.. all i did was the buzz test no other test yet i need to do soon. Is it wierd i uninstalled my programmer and it seemed alot worse on cold starts

2005 F250 cc sb lariat fx4
MBRP 4" Turbo Back Straight Pipe
zoodad mod
20% tint
leveling kit
315/70/17 GY duratrac
Bully Dog Triple Dog w/ Outlook Monitor


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post #5 of 8 Old 01-18-2013, 06:25 PM
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Best, least expensive tool is one you can borrow is at a friend's house or garage! Next best is AutoEnginuity with the ford bundle for about $360. Your local dealer or shop will do the contribution/balance for about $100. Factor in how times might you use it, where you live and how much time it will save you. You could always go partners if you have some friends with a similar truck.

Frank
2007 F-250 Lariat Crew. MBM 190/50s,
KC-68 Stage 3 Turbo,
DashBoss/F/P, and a few other goodies
Stiction Problems - Fix it yourself! - http://www.powerstroke.org/forum/gen...ml#post4509754
Want to modify your injectors DIY - http://www.powerstroke.org/forum/6-0...ger-flows.html

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post #6 of 8 Old 01-18-2013, 06:42 PM
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I noticed a HUGE ( I'm trying to say like reeeley BIG) diffrence in my cold starts after I went from dino oil to synthetic. What oil are you running?

BPD OIL COOLER W/COLD WEATHER PACK & BPD oil bypass amsiol filter
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post #7 of 8 Old 01-19-2013, 05:20 AM Thread Starter
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Rotel 15w40

2005 F250 cc sb lariat fx4
MBRP 4" Turbo Back Straight Pipe
zoodad mod
20% tint
leveling kit
315/70/17 GY duratrac
Bully Dog Triple Dog w/ Outlook Monitor


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post #8 of 8 Old 01-20-2013, 11:53 PM
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Try Amsoil 540, it get pretty cold here in Alaska, and that helped my cold starts.
Just take a few more mins to warm your truck up if you dont want to switch oil.
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