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Black smoke from a diesel **IS** unburned fuel. There are only 2 causes, as
already mentioned poorly atomized fuel from fouled spray nozzles / injectors
is one. The other more likely cause is insufficient air to the fuel burned,
try not to think air fuel ratio as it doesn't really apply, we always prefer
excess air on a diesel. Most likely cause is a dirty air filter or other
restriction. On a turbo diesel an air leak downstream of the turbo is a
common problem. A faulty turbo may not be producing the boost required.
Start with the easy stuff first. I would not go pouring water thru the
engine as it runs if that's what you were asking. Side note, I tried the acetone in fuel trick on my Nissan commuter car
(gas). Very carefully noted the mileage over the same course for several
trips and saw exactly no difference. I figured it was a hoax and I was dumb
enough to try it. HTH, Tim Andres
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Thomas y Reina Jakits
Sent: Monday, January 01, 2007 5:31 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: OFF-TOPIC
Buly,
water IN the injectors is pretty unlikely - I use and actually change a fuel
filter regularly - The Toyota filter is made to seperate water, never any problem.
However if you imply water drops hitting the injectors....
Anyone else?
Thanx Buly,
TJ
----- Original Message ----- From: "Bulent Aliev" <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, January 01, 2007 8:01 PM
Subject: [FlyRotary] Re: OFF-TOPIC
Thomas, my bet is on dirty injectors. I would suggest servicing them. Any
water in the injectors most likely will blow the tips off I was told.
Buly
On Jan 1, 2007, at 7:44 PM, Thomas y Reina Jakits wrote:
Hi all,
First HAPY NEW YEAR!! to all of you! :))
Question:
A couple of weeks ago, someone (I think it was Lynn....) mentioned feeding waterspray into the throttlebody/carburator at around 2000 rpm (piston engine) to clean any deposits from the cylinder/piston/ turbo/etc.
The discussion was about cleaning lead deposits from sparkplugs in the Rotary, me thinks....
I wonder if anyone of you is also a Dieselhead (besides the Rotary:)):
Would this procedure help with a small Turbo-Diesel? (Toyota 3L Turbo Diesel).
It runs great, but starts to puff small black clouds if I really rev it (Redline 4400 rpm). Smoke puffs start at around 3300 with pedal on the floor - under full load.
I wonder if this is only some carbon deposits in the exhaust or a dripping injector or ???
I am running Acetone in the fuel (so far good results....).
The engine has close to 110K km on it.
I don't mind testing something, but if it is a definite no-no, I would like to know up front - it IS my daily driver.
The engine is runnnig on Mobil Delvac 1 (The Mobil synthetic for Diesels)
If it makes any sense to clean the engine with water spray no and then, please advice!!
Thanx,
Thomas Jakits
TJ
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