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#1
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do clogged injectors=blue taolpipe smoke?
heard this today from a former mechanic. he said an accompaning loss of power occurs when the injectors are clogged and the tailpipe smoke is blue?
this is a diesel schoolbus non mb(but we are getting mb engined buses in the near future). any truth?
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currently [1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership 1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red the above two cars are for sale and can be seen on the cars for sale thread here. pix also available. 240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car 23" gt 21 speed still on original tires-still got the nubs 21" khs tandem |
#2
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Quote:
clogged injectors would have either white smoke or black smoke along with a heavy odor of fuel in the smoke.
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Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#3
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83-240D,
Seems like clogged injectors would not cause smoke from the exhaust. If an injector was not injecting fuel the engine would miss fire on that cylinder and only air would come out of the cylinder. White smoke from the exhaust it actually unburned fuel, fuel that has not ignited. I don't see how a clogged injector would cause unburned fuel to get into the exhaust sine it isn't injecting any fuel. Just my logical conclusion. P E H |
#4
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thanks fellas.
i thought that idea was wrong. loss of power would then be caused by the rings getting a little wide reducing compression and allowing oil into the cylinder. i will ask the driver about hard starting also.
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currently [1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership 1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red the above two cars are for sale and can be seen on the cars for sale thread here. pix also available. 240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car 23" gt 21 speed still on original tires-still got the nubs 21" khs tandem |
#5
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I've seen "clogged" injectors that still pass fuel -- dripping instead of spraying. In that case you get nailing and black smoke from unburned fuel.
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'83 240D with 617.952 and 2.88 '01 VW Beetle TDI '05 Jeep Liberty CRD '89 Toyota 4x4, needs 2L-T '78 280Z with L28ET - 12.86@110 Oil Burner Kartel #35 http://i16.photobucket.com/albums/b1...oD/bioclip.jpg |
#6
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http://www.freeautoadvice.com/diesel/smoke.html
Here is a link to a diesel exhaust color analysis article. It is not the best one that I have seen but it was high on the google list. Google will probably give you better. I googled:diesel diagnostics smoke color Quote:
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#7
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Quote:
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currently [1981 300 td tdidi 165500 dark brown/palamino-Brownie-mine-3k miles of ownership 1983 240d 162+++ Anthricite grey w/ henna red interior and hella lights-wifes car-Red the above two cars are for sale and can be seen on the cars for sale thread here. pix also available. 240d-144+ Manilla Yellow w/ palmino interior-greasecar kit-Blondie-the college kids car 23" gt 21 speed still on original tires-still got the nubs 21" khs tandem |
#8
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smoking
the blue smoke from unburnt diesel and the blue smoke from oil consumption is not easily distinguished in my experience. the way to tell one from another is to look at how and when it is smoking.
otherwise the above list of symptoms etc is excellent.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC] ..I also have a 427 Cobra replica with an aluminum chassis. |
#9
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very informative
I have recently been dealing with some unusual smoking with my 300CD, maybe someone can shed some light on.
For the last few months, when it was cold out, I'd start the car in the morning and let it idle about 5-10 minutes. After backing out of the driveway and on the first acceleration, a nice BIG cloud of white smoke with some blue tint would exit the car. The rest of the time, it produced no visible smoke. It will still do this. With in the last two weeks, I've noticed when I'm sitting at a light it will start smoking heavily untill I pull away, and then no visible smoke, only at idle. There also doesn't seem to be a pattern to it, as in it doesn't do it everytime I come to a stop. The last time it did it was yestarday when I came to stoplight after about 10 miles of Interstate driving between 70-80mph. Its really starting to bug me. Thanks for any advice...
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1980 500SE/AMG Euro 1981 500SEL Euro 1982 380SEL 1983 300TD 1983 500SEC/AMG Euro 1984 500SEC 1984 300TD Euro 1986 190E 2.3-16 1986 190E 2.3 1987 300D 1997 C36 AMG 2003 C320T 4matic past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350 |
#10
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Quote:
Tech Specs Injectors- Torque and Bar Pressures More info and some links in this thread. |
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