"Italian tuneups are an occasional full throttle run. Not always
needed or desirable for fastest acceleration.
"If black smoke on less that full throttle, and lots of it, check air
filter, injectors, etc. then adjust driving habits to minimize."
So, high rpm, not necessarily flat-out acceleration or floorboading it.
Best
Keith
How about what Ed Beggs calls an Italian tune-up? (Pardon me Ed.)
What's the general opinion of Italian tune-ups anyway?
By the way, all, how many have heard of the "Italian tuneup"? You see it
mentioned a lot on the Merc discussion groups, as at the terrific resource
at www.mbz.org
It is really indispensable on all these diesels - basically it's take the
thing out and floor it - often. Some say once a day full power acceleration
("floorboarding it") on a Merc is the best thing for it.
(Of course, on the old 240's and 300's this is how you drive them anyway,
just to get them moving!)
We have seen it at least twice now, where injectors were plugged up from
long term "babying" and urban driving of the diesel, and the car in one case
was acquired for $500 - and promptly turned into a $1500 car after a 10
minute "tuneup" of this nature. It is of value particularly for SVO users to
know that diesels are meant to be worked, not driven around easy at low rpm
all the time!
(In the second case, the engine knocked and ran so poorly that even our
local best, most honest and reliable VW shop owner was convinced it needed
an engine overhaul. A floorboarded trip a long hill solved the problem and
it ran wonderfully). Just be careful of not blowing old coolant hoses,
overheating, etc. Just a minute or two. And take long highway trips, and
don't run in overdrive around town.....keep those rpm's up.
How does that square with what Todd says about giving it more fuel
than it can burn?
You can get good acceleration without being leadfooted, just keep
the throttle ahead of the revs, no need to floorboard it. What's
required for this effect, acceleration or high rpm or both? Still no
need to pump too much fuel in, you can maintain high rpm short of
full throttle too, on much less than with fast acceleration.
Best
Keith
<snip>
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