Rough start and black smoke help asap

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zpaulis1

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Hey guys, I have a 96 ram 1500 5.9 360.. I had my truck in storage for about 6 months while I was overseas. I came back for Christmas and it's cranking real slow and backfired once. After cranking for an unusual amount of time it started and I gave it a little gas and a little black smoke came out of the tailpipe.. Keep in mine it's 0 degrees out with a foot of snow.. So there's a lot of white smoke with it. Anybody have any ideas?
 

Brakelate

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Black smoke was just the unburned fuel cooking off that was injected in the motor while cranking.

Sounds like it has a weak battery. Or, just cold and been sitting.

As long as it stops smoking when it gets up to temp, no worries.

Let it run, take it for a good drive to "clean it out" and get fully up to operating temps. It should be fine, and crank over nice and easy when warm. It should also burn clean when warm and you shut it off and fire it right back up.


Things just don't like to sit. Especially in the extreme cold. Not having a "battery tender" attached, or running some Fuel Stabilizer through it before storage will make symptoms like you are experiencing worse.

Take some time to tuck her in properly, and the next start up after a "mid term" storage will go much better.

But, you should be fine now that it is running.

Glad you are back. Enjoy your time and your truck!
 
OP
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Z

zpaulis1

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Good to hear! Thanks for all the knowledge, I'll definately "tuck her in" better when I go back!
 

dodge dude94

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I'd go further and say you MIGHT have a leaky injector or a few that leaked down when you were gone.
 

Brakelate

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Injectors shouldn't have leaked down when just sitting with the power to the fuel pumps off, should they?

How is it running now ?
 

dodge dude94

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It would leak down by bleeding off the fuel pressure, then when he went to start it, the pump charged the system again.
 

Brakelate

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Bleeding off fuel pressure just sitting? Not to get all Techno-Crazy and start picking the idea apart, but I don't think it is a "returnless" fuel system. It should all bleed off from the fuel rail back to the tank... unless they (the injectors) were SERIOUSLY leaky. At which point, I don't think it would run right at all, ******* fuel into the cylinders all the time, especially under pressure.

Just see things my way. It was unburned fuel pumped in there while cranking, under the enrichment circuit and when it finally fired, it burned off, with a little black smoke.

If it is not running "rich" and puking black smoke now, my theory is supported.

Now surrender peacefully, with honor, so I can go to bed feeling the fuzzy high that comes as the spoils of victory as I demonstrate my ability to dispense endless amounts of incredibly useful internet mechanical banter.

I shall spare your women and children. Perhaps I will not salt your fields, nor destroy your stone temples, as I am in a kind and generous mood.

Make it so, as it may not last and I will have to roll up the sleeves on my SpongeBob Pajama jumpsuit and really go to task on schooling the minions on the art of modern day (actually two decade old) automated fuel delivery system dynamics.

:rofl:
 
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Wchnu

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Someone ate a big ole bowl of bull crap sounds like. :) but the information makes sense.


Sent from my iPhone using Tapatalk
 

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