exhaust smoke

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sdeck's picture
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Joined: 08/28/2006

Is it normal to see a cloud of exhaust smoke in your rear view mirror when accelerating hard on WVO? Seems to happen predominantly if I step on it hard going from ~60 mph to ~75 mph. It seems to be mainly grey, not the big black belchers you see from the big diesels and not so prevalent when running on dino. Seems to lessen on subsequent acceleration events. I added some diesel kleen to the WVO tank recently (~6 oz/10gal WVO). Could it just be cleaning out the crap?

I've got around 800 WVO miles so far in the past 1.5 weeks since the GC install. Am I just being a nervous newB?

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"

Greaseburger's picture
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Joined: 09/02/2005

I would say perfectly normal, how hot is your grease getting pre injector? Cold grease will cause more smoke than good hot grease and also I get it when I run around town low rpm.

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96 Vw Passat Tdi
Greasecar kit
5k+ so far and running great
2000 Excursion running My B100:)
Homebrewing the good stuff in the Appleseed:) 50 gals per batch!!

Anonymous
Anonymous's picture

Quote:
Originally posted by: sdeck
Is it normal to see a cloud of exhaust smoke in your rear view mirror when accelerating hard on WVO? Seems to happen predominantly if I step on it hard going from ~60 mph to ~75 mph. It seems to be mainly grey, not the big black belchers you see from the big diesels and not so prevalent when running on dino. Seems to lessen on subsequent acceleration events. I added some diesel kleen to the WVO tank recently (~6 oz/10gal WVO). Could it just be cleaning out the crap?

I've got around 800 WVO miles so far in the past 1.5 weeks since the GC install. Am I just being a nervous newB?

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"
it sounds like you might have a bit of water in your VO. try Howes fuel treatment it helps remove the water. the only place I have ever been able to find Howes is at a truck stop TA or Flying J

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82 240d (GC kit)
80 300TD (GC kit)
84 300D one tank for the summer (then GC kit)
85 300D (GC Kit)
82 300TD one tank for the sum (Then Hom

sdeck's picture
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Joined: 08/28/2006

I have a standard GC install with serious insulation on the WVO lines. A thermocouple stuck between the insulation and fuel line exterior downstream from the veggie filter reads around 160F. I have no idea what the temp at the IP is.

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"

BrianMiller's picture
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Joined: 05/11/2006

white smoke = air in fuel
black smoke= to much fuel change air filter
blue smoke= burning oil. rebuild or get new engine

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I use to be ForrestGump..My Forum, My Web,My BLOG,

sdeck's picture
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Joined: 08/28/2006

Brian,

Not black. Not Blue (oil level is rock steady over 5K miles). I have noticed the WVO tank is under vacuum after driving. That could explain the too much air idea. I have contacted GC about the vent in the tank, but their initial response was that it was pressure from heat of expansion of the WVO. Not much confidence in that idea as I know the difference between pressure and vacuum. Damn near need a screwdriver to pry the fill cap off after driving. The tank then goes "doink" as the lid pops back up and you can hear the air being sucked into the tank.

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"

REguy's picture
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Joined: 03/15/2006

sounds like the vent your grease tank cap is clogged. I would take it off and soak it overnight in a fuel (regular dinodiesel or gasoline should do fine, biodiesel would work great but might harm the cap--I don't know). You could also poke a pin through the vent in the gas cap.

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1996 WV Passat TDI Greasecar conversion 2006
WVO rookie, but learning.

TDIguy's picture
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Joined: 06/07/2004

What kind of car is it? A vw under hard acceleration if the intake manifold is a but clogged will make some smoke. Or if the injectors are a bit clogged up.

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01 vw jetta TDI : RC II : VR6 Clutch
Vag-Com tool at home
Running on Veg since summer 04 still learning new tricks.
11mm IP + lift pump = POWER
Another good veg site
http://fryertofuel.hypermart.net/store/page6.html

sdeck's picture
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Joined: 08/28/2006

'03 Jetta TDI auto. I bought it w/ 71K on it in August specifically to convert. Finished the conversion a week ago. The previous owner had all of the dealer service paperwork and had done it all by the book. Never cleaned the intake or intercooler, however. I suppose I need to find a day to do that.

Doesn't seem to smoke on Dino and doesn't smoke all the time, just in morning after running on Dino 5 mins and getting on the highway. Garaged O/N with outside temps in the 40s-50s.

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"

BrianMiller's picture
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Joined: 05/11/2006

how bad is the smoke? if i stomp on my gas pedel i get smoke in the morning but not alot.. the tank does need an air vent.

-------------------------
I use to be ForrestGump..My Forum, My Web,My BLOG,

sdeck's picture
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Joined: 08/28/2006

I wouldn't characterize the smoke as excessive, just a haze behind me for a second or two. I am probably just being a bit paranoid (but that doesn't mean they aren't after me). I'll try to figure out the tank vent and keep an eye on the frequency/duration.

Thanks,

sdeck

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sdeck

2003 Jetta TDI, GreaseCar kit

"If you make it idiot proof, nature will make a better idiot"

Anonymous
Anonymous's picture

it still sounds like you are burning off a bit of suspended water in your VO.

water hitting the engine also creates white smoke and if it's only when you romp on it your turbo is booting and making enough presure to release the water and poof you have a bit of white smoke under hard exceleration.
but the air thing sound plausable too.

-------------------------
Please use and support:
http://www.freetradecampus.com
and
http://www.linuxrecruiting.org

82 240d (GC kit)
80 300TD (GC kit)
84 300D one tank for the summer (then GC kit)
85 300D (GC Kit)
82 300TD one tank for the sum (Then Hom

TDIguy's picture
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Joined: 06/07/2004

make sure you keep a close eye on those fuel temps. Don't let it get over 200. 200 before injection is about 230 inside the pump and thats a dangerously high temp for the electronics in the pump.

-------------------------
01 vw jetta TDI : RC II : VR6 Clutch
Vag-Com tool at home
Running on Veg since summer 04 still learning new tricks.
11mm IP + lift pump = POWER
Another good veg site
http://fryertofuel.hypermart.net/store/page6.html

YellowBeetle's picture
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Joined: 12/13/2005

If I feel like fast acceleration/sporty driving, I try to do that on diesel and not go too nuts on WVO (that would be a tip of that hat to you Heath, 140mph?). I figure WVO is a thicker fuel anyway and the pressure it must build on my delicate little injection pump is something I want to avoid. If I have to jump on the highway on a short on-ramp, I stay reasonable and don't try to see how fast I can hit 0-60. If I do push it hard I get the haze behind me also, which I'm sure gives the people behind me rather the wrong impression about my veggiecar. Besides, that "hazy mist" is all oily and sticks to the bumper.

I'll wait to do my fast accelerating with a new Tesla Roadster... 0-60 in four seconds! That's some sick take-off, but that's what we have to look forward to with this next-gen of electric vehicles. www.teslamotors.com

Colin