Engine having trouble shutting down??

[JLandry]

Any chance you accidentally put gasoline in the tank duing the last fill up?



Do you still have the receipt to check?



John L.

 

[AH64ID]

drrhoades descibed it to the T... ... happens just like he mentioned

I have a 2006. I can pull the key out and hold it in my hand for probably 2 seconds before the engine finally quits. I always have the clutch pushed in instead of the transmission in neutral. Less banging around this way. Seems to me that it is the pressure in the line bleeding off allowing the engine to run slightly longer. Everything is very smooth and the engine runs great. My friends 2006 does the same thing.

I never said it "diesels smoothly"... ... it idles very smooth like normal after start up but when I turn the key off to shut it down it "diesels" for a couple seconds, has to be "dieseling" at say 100-300rpm if I had to guess before it stops rotating.

Joe

The issue is either a leaking oil seal (which you ruled out from a clean intake), or a leaking injector or sticking injector.

How has your fuel economy been?

Do you have gauges? How are EGT's?

 

[mwilson]

What if one injector was dribbling for a couple seconds after shut down?? The cylinder would be hot enough to ignite that little bit of fuel??

You would still have a little rail pressure.



Just thinking out loud.



Mike.

 

[AH64ID]

What if one injector was dribbling for a couple seconds after shut down?? The cylinder would be hot enough to ignite that little bit of fuel??

You would still have a little rail pressure.



Just thinking out loud.



Mike.

That is probably the issue.

 

[JGheen]

Ok guys, some new developments here..... first things first.....



I do plug my block heater in EVERY night religously during the winter months so it is warm and ready to roll to work everyday from the long cold nights here in southern Cali... ... I know, its not that cold but it does get cold down here. :-laf



Keep in mind its been dark when I roll to work and come home in the evenings..... however, last night I did notice some smoke out the stack on the way home last night. It was dark but I could see smoke in the head lights of the cars behind me. Yes, I am running a 6" stack out the bed and the exhaust is straight piped. Factory 4" downpipe into 5" straight pipe into a 6" stack out bed..... yeah, I know, its as close to performance as I'm gonna get, I have my diesel bug repelent on cuz when it bites me credit cards get maxed out n wifey no like it. :-laf

Anyway, went to work a little later this morning and the smoke is in fact WHITE. Its a haze and not very heavy, it gets heavier when I engage the Pac Brake though... . coolant has no oil and oil has no coolant, engine oil level seems to have very SLIGHTLY gone UP but smells normal. Exhaust scent smells normal at idle as I hopped in the bed and took a good wiff. :-laf Did a standing rev check while parked and the normal light black puff comes out when I pin it to the floor for a second. Engine still "dieseling" for a second or two when I turn key off to shut er down. Still getting the odd exhaust tone during acceleration like a pulsing or kind of popping, if you will. Smoke is not heavy during accelration but does turn black. Rolling down freeway, it was a WHITE haze.

So, in my experience I am leaning towards leaky injector..... what do you guys think?? If it is an injector, how do I determine which one?? Is taking it to dealer to find culprit injector only option?



Thanks for all the help guys, I appreciate the feedback!!



Joe

 

[JGheen]

I can also add that the engine water temp gauge seems to run a little hotter than normal, yeah, I know its facotry and not the best way to tell if engine is running hotter but to me it seems to stay above the 200 mark a little more than normal since this problem.

Unfortunately I am running no aftermarket gauges for EGT, water or boost. Again, I used to be a big sled puller out here with deep pockets but that finally caught up with me, so I have my diesel bug relepent on for my CR. Can't afford to go hopping up this truck, wanna keep it stock to keep wife happy and finances in check. :-laf



Joe

 

[KLauber]

White smoke is not a good thing... . yeah you may have the warranty expiration virus whereby everythings fine until the coverage expires... . ! I just noticed my steering box is weeping right after the 100K rolled over... !

Experienced diesel mechanics will soon chime in to help.

 

[cerberusiam]

You have an injector(s) bad and\or leaking if your seeing white smoke. Its injecting late and is puking unburned fuel out the exhaust. The pintle seat is probably bad and the pitle never seats the needle to shutoff fuel flow to the nozzle.



Bet if you have a cylinder contribution test done you will see spikes on some cylinders indicating problems. The spikes could be high or low compared to the other cylinders depending on how the failure is effecting the injection event.



Look for cylinders that are outside the average of all and you will have the bad ones.

 

[AH64ID]

I would try to get it fixed asap, a failing injector can easily least to a piston with a hole burnt in.

 

[JGheen]

I would try to get it fixed asap, a failing injector can easily least to a piston with a hole burnt in.

Thats what I was thinking and am ultimately afraid of in this case, guess I will have to just take it easy on the throttle till I can find time to fix this issue. :{



So would the dealer be the best place to find out which cylinder is the culprit? I don't have one of those laser temp readers or anything which would come in handy on something like this... .



Joe

 

[JGheen]

Can anyone offer the best option for fixing this issue?? Whole new set or just replace the bad one(s)?? How reliable are a set of the DDP 50hp injectors?? Are they worth it for a daily driver??



Joe

 

[Prairie Dog]

Can anyone offer the best option for fixing this issue?? Whole new set or just replace the bad one(s)?? How reliable are a set of the DDP 50hp injectors?? Are they worth it for a daily driver??

Joe

From everything I've ever read these are a great product. When it comes time for injectors, I'm going to get the smaller 30~35 HP parts for the increase in MPG. Incidentally, DDP is just a few miles down the road from me.

 

[JGheen]

I've read that as well, they made me some great injectors for my 12v back in the day..... sounds like I will be making a call to Washington.



Joe

 

[AH64ID]

When my injectors need a freshen up they will be sent to DDP for testing and install of 35ish hp nozzles.

If you can afford the down time of a week or more I would pull all 6 ASAP! Send them to DDP and see what's wrong, then decide on nozzles from there. Personally I wouldn't go any bigger than 25-35 hp on stock tuning/turbo.

 

[JGheen]

So is that the cheapest and most reasonable route to go in this situation? Send the factory ones to DDP? I knew a new set is expensive but jeez, a set of 50hp sticks is friggin $3200!! Plus a core charge!



Can anyone who has had their factory set rebuilt with new tips chime in and give me your experience? I would think this is the route to go..... I parked the truck in the garage as the drive home seemed to be worse than the drive to work..... engine sounded like crap and was blowing even more smoke. Just gonna rent a car for a couple weeks and get this thing worked on and fixed.



So far the repair list is replace clutch, pull injectors for repair and swap out leaking battery on driver side. I am sure more will come up since truck is aware warranty is expired!:-laf



Thanks for the help guys, let me know on what best route is for injectors.



Joe

 

[Prairie Dog]

Yea, $3200 is hard to swallow, especially if they don't do the install!
That must bring it closer to $4k or worse. Daaamm.

 

[S.Morris]

I wouldnt be putting any larger injectors in given the short running you are doing. You already have a good recipe for carbon build up, without making it worse.

I can tell you from personal experience that you can go from a perfectly running truck to a scored cylinder from a failed injector in 30 miles. DO NOT take the chance to keep running it.

 

[JGheen]

Yeah, I limped it home last night from work babying the throttle all the way home. Smoked pretty good just in that last trip. Renting a car this morning and calling DDP hopefully before lunch to get some info. Gonna pull injectors this weekend and get them sent up to Washington right away.



Joe

 

[JGheen]

So I called DDP, disapppointed to find out they only test my injectors and won't rebuild them... ... I thought they would rebuild them if broken but they said test only, clean and replace nozzles, if they had any... . they even said nozzles are unavailable at the time for some reason and have been for over 8 months..... find that kind of hard to beleive but sounds like I will b shopping around as I am not about to dish out the $3200 for a whole new set since that would be my only option with them it seems.



Joe

 

[DE Jeeper]

try calling a formula 1 dealer. when mine went bad they were able to rebuild them and put new tips on. would not recomend more the n 50hp tips. so far 130k on the f1-flux 2 with no problems.



aaron