I don't even notice it with mine unless it's night time (headlights behind me look like they're going through fog
)
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| Black smoke / soot on acceleration...how much is too much? http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=34665 |
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| Author: | baddabing [ Sat Aug 02, 2008 1:31 am ] |
| Post subject: | Black smoke / soot on acceleration...how much is too much? |
Hey guys.. When accelerating from a stop, I'm quite surprised how much black smoke / soot is left behind when you put your foot down a bit! I'm not putting my foot to the floor by any means. Is this the norm? The other day I was climbing a steep grade and I put my foot into it and the RPM climbed to 2500+ rpm (when the transmission kicked down) and the car behind us was in a blacky gray picture in the rear view mirror. I'm a diesel guy (new Kenworth), have been around heavy equipment for many years! What do you think? Thanks! Matt |
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| Author: | msilbernagel [ Sat Aug 02, 2008 1:43 am ] |
| Post subject: | Re: Black smoke / soot on acceleration...how much is too muc |
Greatly exacerbated, I believe, by a combination of aerated fuel and the EGR. The EGR in that thing definately contributes a lot to the cloud... Try the ORM and see if it improves a little? Make sure your fuel filter is clean.. any restriction seems to make the air thing worse. If it's sluggish, it could also be the turbo not providing enough air.. but I doubt that. Got a clean air filter? Mark - baddabing wrote: Hey guys..
When accelerating from a stop, I'm quite surprised how much black smoke / soot is left behind when you put your foot down a bit! I'm not putting my foot to the floor by any means. Is this the norm? The other day I was climbing a steep grade and I put my foot into it and the RPM climbed to 2500+ rpm (when the transmission kicked down) and the car behind us was in a blacky gray picture in the rear view mirror. I'm a diesel guy (new Kenworth), have been around heavy equipment for many years! What do you think? Thanks! Matt |
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| Author: | durangotang [ Sat Aug 02, 2008 1:58 am ] |
| Post subject: | |
I don't even notice it with mine unless it's night time (headlights behind me look like they're going through fog )
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| Author: | jinstall [ Sat Aug 02, 2008 3:20 am ] |
| Post subject: | |
I find it only happens when the Cat is cold or I have a dirty air filter. Once the engine and Cat are warm it all seems to go away. I run at a higer speed all the time and this could also be a factor as well. Normally I just take a 100mph blast for 10-15 miles and it is all good. |
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| Author: | kntrygurl [ Sat Aug 02, 2008 11:25 am ] |
| Post subject: | |
I usually put my foot in it just see it blow smoke!
I love doin to all the people who work on the pipeline with my husband who drive duallies and just love blowing smoke at me.....Now granted mine don't blow as much as theres but its still enuff to see it comin out the tail pipe! |
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| Author: | gmctd [ Sat Aug 02, 2008 4:24 pm ] |
| Post subject: | |
Check your air filter first - take it out and firmly tap it on the nearest tree: dusty is dirty - watery fuel will smoke - could be soot trap and muffler are packed with soot, needing hard hiway run at hiway speeds for 30mins to get EGT's up hi enuff to incinerate the particulates - aerated fuel is lean, no smoke @ lean - EGR iffy, usually needed when decelerating down from hiway speeds, or under heavy load and excess fuel when cyl temps are hi enuff to produce lotsa noxious oxides |
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| Author: | warp2diesel [ Sat Aug 02, 2008 9:27 pm ] |
| Post subject: | Mine went away.... |
when I installed my lift pump. The only explanation I have regarding why my black/Dark Grey smoke went away when I installed my lift pump is better control of timing. With the small air bubbles mixed into the fuel they can slow down the delivery of fuel and when it comes out of the injector too late, more fuel is injected, burning is compromised and smoke comes out the exhaust. On older Diesel engines we used to install improved injector tips that did a better job of mixing, but you had to increase the pop off pressure. Increasing the pop off pressure retarded the timing due to line capacitance so the timing had to be advanced. I corrected this on my old Perkins when I got a timing light adapter off eBay and set the timing, the scratch marks on the pump were useless. With the Common Rail the pressure varies for a given demand and the opening of the injector is precise with air in the system it will cause a delay of delivery. Also the small micro burst of pre injection may not even occur and make things even worse. Do check the other items such as the Air filter, MAP, Fuel filter, but if you don't have a lift pump, time to put one in. |
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| Author: | KJ 119 [ Sat Aug 02, 2008 9:32 pm ] |
| Post subject: | |
Cetain Boost seems to help mine with the smoke. Without it,I leave a mean cloud. |
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| Author: | baddabing [ Mon Aug 04, 2008 1:46 am ] |
| Post subject: | |
Thanks everyone for the replys! I changed the fuel and air filter two monthes ago, so it shouldn't be that. I will try the cetain boost and see if that works. I don't really want to get involved with installing a lift pump etc. I have been through all that with a 2001 Dodge Cummins! When I first noticed the words "lift pump" and "Liberty" on the same page, I couldn't believe it.......I thought I was finished with all that b.s. ! TurboDieselregistar.com helped me in a big way in answering many questions in regards to lift pumps Thanks ! Matt |
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| Author: | gmctd [ Mon Aug 04, 2008 9:46 am ] |
| Post subject: | |
Adding a lift pump solves many of the KJ CRD problems, and is prolly the most globally effective fix of all that we've come up with - SEGR might be a close tie The Dodge problem was that Carter spec'ed that pump for non-remote mounting, 'nuther words, to be mounted near the fuel supply source (fuel tank) - but, did Dodge listen? Noooooooooo - Dodge is much bigger than Carter, and they don' need no steenkin' advice from nobody - whadda long-term fiasco - 'course, the previous engine-driven mechanical fuel pumps were spec'ed for remote-mounting, being attached to the side of the engine, and all, so they worked just fine, there, like all engine-mounted mechanical diaphragm\piston pumps from way back in the '30's - some people are just un-trainable |
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| Author: | baddabing [ Mon Aug 04, 2008 12:07 pm ] |
| Post subject: | |
gmctd wrote: Adding a lift pump solves many of the KJ CRD problems, and is prolly the most globally effective fix of all that we've come up with - SEGR might be a close tie
The Dodge problem was that Carter spec'ed that pump for non-remote mounting, 'nuther words, to be mounted near the fuel supply source (fuel tank) - but, did Dodge listen? Noooooooooo - Dodge is much bigger than Carter, and they don' need no steenkin' advice from nobody - whadda long-term fiasco - 'course, the previous engine-driven mechanical fuel pumps were spec'ed for remote-mounting, being attached to the side of the engine, and all, so they worked just fine, there, like all engine-mounted mechanical diaphragm\piston pumps from way back in the '30's - some people are just un-trainable Dodge's solution was to install a new lift pump in the tank. If you ask about that on Turbodieselregistar.com, they all say "DON"T DO IT"! So I mounted a lift pump on the side of the frame near the tank which they suggest. It amazed me that so many people recomended the exact opposite of what Chrysler recomended! So having to go through all this again to make this thing run the way it should.....makes me want to puke! |
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| Author: | gmctd [ Mon Aug 04, 2008 2:52 pm ] |
| Post subject: | |
So, your choices are clearly defined: spend the rest of your life puking, or install a lift pump................. |
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| Author: | jinstall [ Mon Aug 04, 2008 3:41 pm ] |
| Post subject: | |
It has to be the fuel you guys and gals are running in the US as I really do not have those issues. It would be nice to take certain parts apart and see the difference of mine and all of yours. |
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| Author: | baddabing [ Mon Aug 04, 2008 4:05 pm ] |
| Post subject: | |
gmctd wrote: So, your choices are clearly defined: spend the rest of your life puking, or install a lift pump.................
My point is: You would think that Chrysler would have their fuel delivery problems resolved when it comes to their diesels and the lift pumps by now. If you owned two vehicles that needed this modification at your expense.....you would be a little pissed too! |
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| Author: | kcfoxie [ Mon Aug 04, 2008 4:37 pm ] |
| Post subject: | |
Hey lift pumps in Jeeps, clutches in VWs. When will these stubborn manufacturers learn? A: Never. |
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| Author: | gmctd [ Tue Aug 05, 2008 2:47 am ] |
| Post subject: | |
Point taken - my point is, you can either whine about it or fix it - the reward is in a well job good done External lp is easy to replace at fail - external lp creates greater aeration due to internal bypass regulation In-tank lp is not easy to install or replace, and you must adhere to owner's manual instructions by not repeatedly running fuel down past 1/4 tank, as low fuel level causes greater aeration and the reduced fuel level exposes lp, reducing cooling of the electric motor Alternative is to substitute rubber hose and clamps for the oem push-on hose connections back at the tank |
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| Author: | Uffe [ Tue Aug 05, 2008 5:56 am ] |
| Post subject: | |
kcfoxie wrote: Hey lift pumps in Jeeps, clutches in VWs. When will these stubborn manufacturers learn? A: Never.
Still looking forward to replace the clutch in the Skoda. Some say it will last for a thousand years, but I am not so sure 
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