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'06 5.9 'hard' starting


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Hi all,I have an '06 2500 w/5.9L manual trans and just over 106,000 miles. I've owned this truck about 6 months now. When it's dead cold, it seems to always start just fine. However, after I've driven it, if I stop and get back in, it sometimes seems to crank forever before starting. Thus far I have had a local dealer do the oil/filter changes. It is currently due (including fuel filter).I've searched here and read about possible injector problems, and read on other forums about something as simple as o-rings on the fuel lines - both allowing bleeding down of pressure. If those are possibilities in my case, I'm curious why it seems to start fine when cold.Thanks for any suggestions.

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Hi all, I have an '06 2500 w/5.9L manual trans and just over 106,000 miles. I've owned this truck about 6 months now. When it's dead cold, it seems to always start just fine. However, after I've driven it, if I stop and get back in, it sometimes seems to crank forever before starting. Thus far I have had a local dealer do the oil/filter changes. It is currently due (including fuel filter). I've searched here and read about possible injector problems, and read on other forums about something as simple as o-rings on the fuel lines - both allowing bleeding down of pressure. If those are possibilities in my case, I'm curious why it seems to start fine when cold. Thanks for any suggestions.

Since it starts just fine when cold, but is a hard starter when hot, it could be that the PO has the injector timing too far advanced. Hard starting when hot, could also mean that there is a heat / wear issue in the fuel pump, injector lines either not tight or damaged such that when cold they seal up fine, but expand and let air in when hot. Could also be in the wiring harness / connector, with a hot / cold issue. Somebody should be able to hook it to a dianostic tool, to see what is happening during a warm start. Low pressure to the rail when hot, could indicate CP3 issues, lift pump issues, filter issues. Just some things to ponder.
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There was a flash to fix "long" cranking on the 05-06 models, you may want to find out if that has been done. With the dynamic timing of a CR, and the minute adjustment of the tone ring I doubt timing would effect the starting. The bleed down issue is internal to the injector, as the rail pressure drops to 0 within seconds of shutdown on any rig. If you do end up going down the injector road I would pull all 6 and send them off to a company like DDP for testing. With 106K miles you don't want to fix/check just one.

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