Any 05's with intermittent long crank?

[Nightram]

I have noticed this, and I can control when it will happen. I ahve a turbo timer, so when I put it in accesory, it will leave the cluster on, and the overhead console on. If I leave it there for 10 minutes or more, and I go to crank it up, even if I wait, it takes 5-8 seconds to start. Good luck with this, intermittents SUCK!!! :{ :{ :{

 

[jackcaptjr]

My 04 has always started slower than the 99 for all the reasons mentioned.

I recently installed a TST box... ... . like the power and the install fit. Since install the starting is noticably worse. Not sure if setting on 1 and 1 causes it start harder?????? May run on 0 and 0 to see if the symptoms change. Has anyone talked to Mark at TST on this?

 

[Trent]

Dealer's response is oh thats normal behavior, its building up pressure.



On my clicking clutch pedal, oh thats normal, its releasing pressure after it builds.



me: Why doesn't it do it consistently then and why it is more frequent when it colds outside?



dealer: Its releasing pressure after it builds.







Well apparently they were right. It's the pressure relief valve. I wish someone could tell me how this works.



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[Smokey 01]

We have 05's underground as mantrips and they have the same symptoms. Some are auto some 6 sp they all require some cranking to get going especially after a short trip. Worst part about these trucks is how they are flashed to only go 25 MPH :{ .

 

[HardcoreDiesel]

This is a problem and DCX is well aware of it. There is a software issue that's related to the cam and crank sensors. Cummins is supposed to have a "fix" by the middle of this month! My guess is you'll have to take your truck in for a re-flash. I have had the problem on my "06" since day one.

 

[swexlin]

So I'm guessing there will be a TSB issued?

 

[HardcoreDiesel]

So I'm guessing there will be a TSB issued?

Thats what I am expecting. Most dealers won't even have this info yet. As soon as I hear the "fix" is available I will post it here.



Also, I wouldn't crank the engine over for more than a few seconds at a time if it's obviously not going to start as your just wearing out the starter!

 

[swexlin]

Thanks for the info, Mike, please keep us posted.

 

[sag2]

I have not verified it myself, but the flash was supposed to be on TechConnect Monday morning. The dealer will have to put your ECM PN in the computer and it will come back with an update if the flash is really there. Does not sound correct though as the TSB should be out before the flash is out there.

 

[GeoffParker]

Just got my '05 Dually 6sp last week... ... Picked it up in Kentucky and drove it back to Oregon..... Along the way we had the long crank issue several times and most did occur after a long period of driving..... I never let it crank more than 4 seconds, knowing this wasn't normal..... On the second try it started right up... ... . Hope the flash being talked about fixes this.



This is my 5th Ram with the Cummins... ... '93 2wd 5sp reg cab, '94 4wd Auto reg cab, '96 4wd auto club cab, '04. 5 4wd QC 6sp, '05 4wd QC G56..... I love the 05 and will never get rid of her... ... But I might have to give her a stable mate or two.

 

[HardcoreDiesel]

Just an update... . they are still working on it! Should be a TSB soon though. I'll update again when I see it available.

 

[Trent]

Thanks for the updates. I've been testing this and if I leave the key on for a full 7-10 seconds it never happens. It's almost like the lift pump wants to build pressure.

 

[tsi_2baad4u]

For my truck anyway, it has good fuel pressure even when it's taking a long time to start. I've had a fuel press gauge since the truck was brand new and the fuel press comes up right away, it just won't fire off when cranking.

 

[n9oig]

I have an early 2006 that is also experiencing this long crank

 

[sag2]

I don't believe the flash will have anything to do with fuel pressure. As I understood the problem, the cam and sensors need to sync up before the injectors are told to fire. The dual mass flywheel has enough mass that when ing, it gives a torsional (rocking) load on the and the PCM says were not synced up so were not firing. After a very long the PCM just ignores one sensor and uses the other, and it starts. The flash should de-sensitize the cam offset, or just ignore it earlier and go back to one sensor only to start.

 

[HardcoreDiesel]

I don't believe the flash will have anything to do with fuel pressure. As I understood the problem, the cam and sensors need to sync up before the injectors are told to fire. The dual mass flywheel has enough mass that when ing, it gives a torsional (rocking) load on the and the PCM says were not synced up so were not firing. After a very long the PCM just ignores one sensor and uses the other, and it starts. The flash should de-sensitize the cam offset, or just ignore it earlier and go back to one sensor only to start.

You are correct!

 

[Trent]

Any news yet? I still haven't had it occur yet since allowing more time between turning on and cranking. I can experience it easily by starting warm right after the wait to start light goes out.

 

[GeoffParker]

I'm interested in hearing about a solution as well..... Just had it happen this morning.