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General Information => Troubleshooting => Topic started by: DAKOTAKIDD on September 04, 2009, 06:44:41 pm
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Hey guys, I did search on this topic and could not find an exact answer but I have a 91 eco diesel jetta 1.6 turbo and on start I am getting a small puff of brown/black/grey smoke out the back. My wife told me what colors were but I have not seen it for my self.
Is this anything to be concerned with?
Thx
DK
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It's normal for the older pumps. They do it by design. Starting with the AAZ pump bosch put in a limiter to reduce the starting fuel, which in return lowered the puff of smoke.
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The next time you can do your general maintenance all at one time, or at least the oil change and air filter at same, it might clear up or minimize for a while. If luck is in your favor.
I don't get too overwhelmed by anything mine does on a restart.
It does its own thing from time to time. Most the times seems clean, sometimes a little blue sometimes a little black sometimes little greyish.
First crank of the day is when most of its colored farts are done.
But always runs the same/fine.
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thats normal
when the pump is shut off and not spinning, the fuelling goes to max position - as soon as the engine fires and the pump reaches 300 or 400 revs the centifugal weights get pulled and it idles
The black is from the huge amount of fuel for startup
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a slight blue tinge is sometimes present due to oil sitting on the piston/ rings just from the normal lube process, mines a smokey little bugger in a morning lol :D
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yeah - and better check your air filter - if clogged the engine will siphon oil and mist it in the precup - it'll burn blue on startup then
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Thanks for all the reply's!! After reading them all it seems I am worrying about nothing. I have checked my air filter and its wet from rain ingestion. I will dry it out and see if it changes anything.
Cheers!!
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Rain ingestion!?!? :o After you get your filtered dried out you may want to get that issue sorted as well...
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I have looked at the air box and it has two intakes. One in the front ( ram air) and one that has a "snorkel" that leads to the rear of the engine. The rear inlet leads to a flapper valve in the air box. I have no idea what its for.
Maybe someone call help here
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Thanks for all the reply's!! After reading them all it seems I am worrying about nothing. I have checked my air filter and its wet from rain ingestion. I will dry it out and see if it changes anything.
Cheers!!
that air filter needs to be protected from sucking in to much moisture/rain..go back to the stock set up if useing a stock style filter..I have had good luck with either the mann or mahle filters..this might apply to you; the trouble with many aftermarket filters (fram in my case) ..once they become to wet, the drying process changes the filter material in such a way that it becomes difficult for the diesel to breathe..and diesels need to get all they can get and this happened to my N/A golf...a clean looking fram filter that was slightly choking the motor..could be another possible reason for the smoke (black color that is)..how is the fuel consumption
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The funny thing about this is that I think its the stock set up for the eco diesel. I looked at a 89 jetta idi and it has a different set up with only one intake, no flapper valve and the front intake has a boot that connects the piping to the inner fender well. Mine has no hole or nothing.. Maybe someone with a eco can ding in here to be certain.
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I have a great shot of a minty 92 ECO underhood.
IM or post your email addy and I will send it to you.
i'm unable to post pix to a photohoster
it sounds like your system has been modified.
maybe even a rendition of a GTD type cold air intake.
A wet air filter sounds AWFUL strange.
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You have a pm.
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It sounds normal to me. I've never seen an eco diesel but all the air boxes I've seen have that flapper valve for drawing in warm air from the back of the motor on cold starts.
Come to think of it it's been a while since I saw the Mk2 air box and I may be confused with all the mk3 air boxes...
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I have looked at the air box and it has two intakes. One in the front ( ram air) and one that has a "snorkel" that leads to the rear of the engine. The rear inlet leads to a flapper valve in the air box. I have no idea what its for.
Maybe someone call help here
My '84 carbureted gasser rabbit's airbox sounds just like that, the back intake was for heated air off the exhaust mani and the flapper chooses were the air comes from.
Maybe the PO of your car was like me, my gassers airbox is now in the diesel ;D
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I have a great shot of a minty 92 ECO underhood.
IM or post your email addy and I will send it to you.
i'm unable to post pix to a photohoster
it sounds like your system has been modified.
maybe even a rendition of a GTD type cold air intake.
A wet air filter sounds AWFUL strange.
I just looked at those pics and thats what mine looks like. The problem is that the intake to the airbox is right behind the r/h headlight. So when you are driving in wet or raining conditions, the water gets rammed in there causeing the wet filter. I would like to see the intake of the box on that eco from the pics cause it may have a elbow or something to move the inlet over so it doesn't get water rammed in.
Any more pics floating around out there?
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you could cover the opening over with something and use a hole saw to make new openings on the lower half of the air box, you could make them on the inner wing side or by the alternator side if you wanted, or even both
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Eco owner here... Yep, sounds like you have a stock box to me, and the snorkel thingy pulls warm air from near the exh. manifold, etc.
I took my box out (b/c I needed room to put all of my veggie oil plumbing) but IIRC there was some sort of baffle to keep water from getting in. I'll have to pull it out to refresh my memory.
I used a small cone filter in it's place, but have not been entirely sure that it isn't too small for the task. Worse, I had to locate it behind the headlight, so it is REALLY exposed to rainwater & car wash blasts. I would like to re-route it over to the "clutch cable" area of the bay, but haven't figured out exactly what ducting I need. Was thinking of silicone tube components...
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Do you still have the old box.. If its not to much trouble, can you let me know and see if you have the baffle you are mentioning. I will check mine tomorrow and see if mines MIA.
Thx
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Hi Dakota,
Sorry for the delayed response - life's been busy. Here are some pics of my Eco box. Best I can tell, any water that finds it's way into the "ram tube" ends up in the bottom of the airbox where it can drain out. The third pic shows the headlight housing that leads into the airbox. The last pic shows the metal duct tube that leads back by the exhaust manifold to pick up heat when cold. Faulty memory, though - no true baffle. LMK if you have ???s.
(http://i681.photobucket.com/albums/vv180/Steverino68/th_IMG_3991.jpg) (http://s681.photobucket.com/albums/vv180/Steverino68/?action=view¤t=IMG_3991.jpg)
(http://i681.photobucket.com/albums/vv180/Steverino68/th_IMG_3992.jpg) (http://s681.photobucket.com/albums/vv180/Steverino68/?action=view¤t=IMG_3992.jpg)
(http://i681.photobucket.com/albums/vv180/Steverino68/th_IMG_3993.jpg) (http://s681.photobucket.com/albums/vv180/Steverino68/?action=view¤t=IMG_3993.jpg)
(http://i681.photobucket.com/albums/vv180/Steverino68/th_IMG_3994.jpg) (http://s681.photobucket.com/albums/vv180/Steverino68/?action=view¤t=IMG_3994.jpg)
(http://i681.photobucket.com/albums/vv180/Steverino68/th_IMG_3995.jpg) (http://s681.photobucket.com/albums/vv180/Steverino68/?action=view¤t=IMG_3995.jpg)
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Thanks so much for the pics..... I am missing the part in pic 3 that attaches the box to the headlght. Would you be willing to sell that or sell the whole set up cause you are using veggie. Let me know
Thx so much
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I want to hold on to my setup for now - I'm not entirely happy with my configuration yet and don't want to close the door on the stock method until I'm sure. I'll keep you in mind, though.
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my experience with the eco diesel is mighty limited but id lay good money down that someone somewhere for whatever reason has used a 1.8 8v gas airbox on your diesel. you can likely confirm this by looking at the outside of the bottom half of your airbox on the engine side (the only side thats not blocked from easy viewing) you will see a round shape with a little spout. the spout is for a vaccuum line that opens the little gate inside to bring in warm air from the heat off the manifold for proper intake temp. there is no call for this in a MK2 diesel (no computer). also the diesel will get its air from inside the fender. you can see a 5"x5" square hole where a plastic plate goes in and an elbow feeds air into the far side of the bottom half of the airbox. ;) pick up any old IDI airbox and buy a new filter. paper filters dont come back from getting wet. good luck
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Thx for the reply. as far as I have researched this is the correct air box set up for the eco. The mounting holes in the inner fender are stock and meant for this set up.. So are the hooks to keep the box in place. I have no place to put a intake through the fender. Completely blocked off. I will try and find another setup but I will also keep looking for the part I am missing to complete the stock eco package.
Thx again!!! :)