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#1
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help, black smoke when accelerating
is this normal for a 603 non turbo? its an 87 300d.
i notice i emit black smoke when accelerating hard, its quite embarassing, any opinions? thanks
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85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#2
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first thing....
check/ replace air cleaner element.
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Current money-pits: 96 Passat TDI 78 300D 100k miles(60miles/day)FOR SALE 91 Jetta Diesel 250k miles (80miles/day) 82 Toyota Diesel pickup 150k miles; out of service for a little while with a valve problem. All on BelenBioDiesel Past diesels: 01 Golf TDI 81 Isuzu P/U 85 Jetta 89 KW 425 cat 85 Pete 400 cat (currently still running the west coast with over 1.5 million miles) 81 KW 400 Cummins 77 Freightliner CO ???? Cummins (Buttercup) 57 180D lots of miles(gone but not forgotten) |
#3
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Black smoke = unburned fuel
A good starting point is the air filter. If you don't know the last time it was changed, its probably time to replace it.
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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter. '84 300D Turbo 240k (Anthracite Grey) - Garage Queen '83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver I'm not a certified mechanic, but I did stay at a HolidayInn Express last night. |
#4
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any idea what style of injection pump it has?
If it is only on acceleration then it could very well be that it is getting too much fuel (max fuel delivery too rich). This was the case on my 240D such that when you pushed the throttle down to accelerate it opened the IP all the way and it was dumping too much fuel so that it couldn't burn it all.
I admit I know nothing about your motor or car though so this is just a thought... good luck.
__________________
'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique |
#5
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It's quite interesting regarding no turbo on this vehicle. I was under the assumption, clearly wrong, that all 1987 300D vehicles were equipped with the turbocharged 603 engine, the same engine as found in my SDL.
I don't have any experience with the naturally aspirated version, but, as others have posted, the air filter is the first place to start. If the engine cannot get sufficient air at full load, it will smoke. Without a turbo, the intake system needs to have no restrictions. I would highly doubt the IP is the culprit, at this point. |
#6
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the air filter is 2 months old, so its not that, my 300d is a euro version that's why it doesn't have turbo (it's an option i think), i don't know about what IP i have, I guess its the standard non-turbo one, how and where do i adjust max fuel delivery?
so black smoke is unburned fuel, since my air filter is new, it rules out lack of oxygen, it means the engine is getting too much fuel, it can be the IP delivering too much fuel or could it be injectors? i don't emit smoke under normal loads, just when accelerating... hmmmmm
__________________
85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#7
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I'll get Dave to make an opinion on it. He's one of the most knowledgeable members on the 603.
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#8
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How do you usually drive the Car? Do you generally ease your way around and only accelerate hard when merging? It could be that you've got some carbon built up in the exhaust and you need to run the engine hard for awhile. Every time I buy a new diesel (and it is far too often) it takes a few weeks of driving them hard to blow out all the crap. These engines thrive on running near full load. Care for it like it was your first born, but drive it like you stole it. Your engine will thank you.
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Bob D. Parrish, FL 1 SDL, 1 D, 1 TD, 1 Mog |
#9
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In thinking about this some more, can you please describe how much black smoke we are talking about here?
I would venture to guess that a n/a diesel will be definitely putting out some black smoke when the rack is fully open because it is necessary to ensure that all the air is consumed and you are making the maximum power available. This is in contrast to the turbocharged vehicles which always have too much air. The question is how much? Is is a touch of smoke that you can see in the rear view, that does not linger? Or are we talking a cloud of smoke that will remain for 10 seconds or so? The former is probably normal. The latter is not. |
#10
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The advice given so far is correct. If the car is a Euro non-turbo, has new air filter, is blowing a lot of black smoke, and is not carboned up... then it's getting too much fuel. Hard to say how or why, though. I'm assuming your oil consumption is normal (quart per 3000 miles or better) and there is no blue or white smoke under any conditions. I'd give it a healthy Italian tuneup and try a bottle of Red Line Diesel Fuel Catalyst in the next tank (or Lubro Moly Diesel Purge), and see if the smoke lessens. If so, it's probably just carboned up. I'm not sure if a non-turbo 603 pump can have it's ADA (altitude compensator) adjusted or not.
BTW, if your car is a USA vehicle, the VIN will start with WDBEB33, if it's a true Euro car it will be something like WDB124130. |
#11
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Tired injectors will smoke, try a diesel purge maybe.
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
#12
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Dave said something that made me want to ask one more question. You don't live in Denver or another high altitude city do you?
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Bob D. Parrish, FL 1 SDL, 1 D, 1 TD, 1 Mog |
#13
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Drawing...
Has anyone ever seen a N/A IP for one of these cars or have access to a drawing? I swear this sounds a lot like the problems I had on my 240.
If there was a drawing you could probably see the max fuel adjustment screw on it if it has one.
__________________
'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique |
#14
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it is indeed a euro car. has the 124 digits on the vin
the smoke lingers WHILE accelerating and completely disappears, from the rear view mirror that is, once it upshifts. i get the smoke everytime i accelerate and the tranny downshifts. its more visible at night because i can see the smoke through the headlights on the rear view. i'll try diesel purge or somethng, do i run it through the tank? or through the filter?
__________________
85 190E 2.3(SOLD) 86 230E (-->300D) sold 87 300D (-->300TD) sold 68 250S w/ a 615 and manual tranny (RIP) 87 300TD (SOLD) 95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded 86 190E 2.3... current project |
#15
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Hey,
The purge is done through the filter. It's a simple and easy process. Check this link: Click Here Danny
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1984 300SD Turbo Diesel 150,000 miles OBK member #23 (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination |
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