Hi Peter,
Picked up my multimeter that reads duty cycle today. Give it a quick try
but don't really know what I'm doing, so have a few questions. Not really
sure what you mean by some read 20% adn MB duty cycle is upsidedown, os it
may read 80%? I found the port and plugs it in. With a half
30% may be correct for key on, engine off. The Benz duty cycle
(actually precent of time at 12V as opposed to 0V) is backwards from
US practice, so a 20% reading on a US car will give you an 80% reading
on the Benz. Not really an issue for you, as the continious hunting
from 37-60% at idle
Thanks Peter,
That helps to clean things up. The plugs are really fouling though, so is
this the O2 reading lean from an air leak and they adding more fuel than it
can ignite? Just want to make sure I understand this? Larry also
recommended a wire and cap change due to the age and mileage.
Several things can foul the plugs. Black thick soot is over-rich,
crusty hard stuff is oil ash.
The only way it will go rich enough to foul the plugs is a very bad
oxygen sensor, a failed electro-hydraulic actuator (on the side of the
fuel distributor -- or a broken wire to it), a failed
Thanks again Peter.
The plugs foul very fast, and it's a thick caked on black as you kind of
discribe with oil, and yet the consumption seems fine. I don't notice any
blue smoke, or any smoke when when starting or leaving from a stop. I've
even had others drive the car, and stop in front of
II ordered mine through a parts store here in Canada, but the catalog is was
ordered from in a US company that have a web site. esitest.com They have
a free catalog too. My model is ED480a. It was about $50.oo US. It's made
in China and I don't see any UL stamps on mine, but you could ask
Thanks just the info I needed.
mak
- Original Message -
From: E M [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Wednesday, May 16, 2007 11:04 AM
Subject: Re: [MBZ] M103 valve guides.
II ordered mine through a parts store here in Canada, but the catalog
http://members.rennlist.com/roadtest/
.
- Original Message -
From: E M [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Friday, April 27, 2007 4:10 PM
Subject: Re: [MBZ] M103 valve guides.
Thanks Scott, we will talk more SOON!.. :-) I don't fance taking the
head
parts and labor at it. Remember that the leading cause for
maintenance is previous maintenance.
Scott
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of LarryT
Sent: Friday, April 27, 2007 18:12
To: Mercedes Discussion List
Subject: Re: [MBZ] M103 valve guides
Some M103's burn oil -- about a quart in 1000 miles (a litre in 2000 km
or so), more than usualy. Never changes, but it's there.
Your plugs should be tan to brownish gray -- if they are black, the
mixture is out of adjustment. What sort of fuel consumption are you
getting? Decent or pretty
-
From: E M [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Friday, April 27, 2007 7:26 PM
Subject: Re: [MBZ] M103 valve guides.
Hi Larry,
I like the keep a case of oil and a box of plugs in the truck approach.
hee hee.
I'll try to do a compression test later
PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Friday, April 27, 2007 7:26 PM
Subject: Re: [MBZ] M103 valve guides.
Hi Larry,
I like the keep a case of oil and a box of plugs in the truck
approach.
hee hee.
I'll try to do a compression test later in the week, but unfortunately
You can test the O2 sensor with the multimeter -- inscrew the cap on
the test connection on the fender (it's on the computer there, a round
screwcap with a safty chain so you won't loose the cap). Put the red
lead in the #3 hole and ground the black lead with the meter on duty
cycle and
looks like the valve guides may be toast on the new to me 300E. :-( Just
did the plugs and they are filthy with caked on burnt oil. changed them out
and went for a quick run. Already, when I pull the new plugs, I see oil.
Anyone know of a source in Canada to do a valve job, and what Im'
: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of E M
Sent: Friday, April 27, 2007 13:00
To: Mercedes Discussion List
Subject: [MBZ] M103 valve guides.
looks like the valve guides may be toast on the new to me 300E. :-( Just
did the plugs and they are filthy with caked on burnt oil. changed
PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of E M
Sent: Friday, April 27, 2007 13:00
To: Mercedes Discussion List
Subject: [MBZ] M103 valve guides.
looks like the valve guides may be toast on the new to me 300E. :-( Just
did the plugs and they are filthy with caked on burnt oil. changed them
Message -
From: E M [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Friday, April 27, 2007 4:10 PM
Subject: Re: [MBZ] M103 valve guides.
Thanks Scott, we will talk more SOON!.. :-) I don't fance taking the head
off just yet. I'll run the car with the fresh plugs
: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of LarryT
Sent: Friday, April 27, 2007 18:12
To: Mercedes Discussion List
Subject: Re: [MBZ] M103 valve guides.
Hi Ed,
Scott;s approach is easily (relatively) done with the proper tools - but
before doing anything - do a compression test
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