Got the Mass Air Sensor (MAS) on Tuesday. Swapped it out in the
parking lot while Daughter was working. Last night she said the car
seems to be fine now. No more searching and stalling.
As for the electrical problem: The turn signals/flasher and wiper
are intermittent together, but are on
Long ago I had weird problems relating the turnsignals and headlights,
but I don't remember the symptoms now. I do remember I bought a used
turnsignal/multi switch and that solved the problem.
You can open the switch up, at least on the newer ones,
and clean up the contacts. The headlight
.
- Original Message -
From: Hendrik Fay [EMAIL PROTECTED]
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Wednesday, November 12, 2008 4:42 PM
Subject: Re: [MBZ] E320 fuel/electronic question
Especially if they are aluminium fuses, get copper ones.
Hendrik
[EMAIL PROTECTED
Yes, and I checked all the fuses last spring when it was doing
this. If memory serves, these components are on different circuits,
but fail simultaneously. SO maybe it is a ground problem under the dash?
Last night was raining and near freezing. I want to try working on
it inside, in the
-- Original message --
From: Loren Faeth [EMAIL PROTECTED]
Yes, and I checked all the fuses last spring when it was doing
this.
Fuses, you don't Check Them, You change them!
They actually build an internal resistance that will cause all kinds of grief.
All
That indeed was Herr Doktor's mantra, but I have many 20 to 40 year
old fuses working. I did change the fuses with no result.
At 09:59 AM 11/12/2008, you wrote:
-- Original message --
From: Loren Faeth [EMAIL PROTECTED]
Yes, and I checked all the fuses last
Especially if they are aluminium fuses, get copper ones.
Hendrik
[EMAIL PROTECTED] wrote:
-- Original message --
From: Loren Faeth [EMAIL PROTECTED]
Yes, and I checked all the fuses last spring when it was doing
this.
Fuses, you don't Check Them,
I will try to check out the MAS and o2 sensor components tonight or
tomorrow. Anyone have advise about how to check them other than buy
a new one and replace it like the dealers do?
Now there are other symptoms:
Error code 10 MAS voltage too high/too low (TENDS TO INDICATE THE
mas IS THE
HAVE you Replaced ALL the FUSES
Now there are other symptoms:
Error code 10 MAS voltage too high/too low (TENDS TO INDICATE THE mas IS
THE CULPRIT)
Turn signals/emergency flashers/rear defrost don't work. All have
intermittently worked or not worked. Not sure if this is unrelated or
Fuses? Remember the Marshall plan
Hendrik
Loren Faeth wrote:
I will try to check out the MAS and o2 sensor components tonight or
tomorrow. Anyone have advise about how to check them other than buy a
new one and replace it like the dealers do?
Now there are other symptoms:
Error
No codes on the built in light.
How do you get other codes?
At 08:27 AM 11/7/2008, you wrote:
Loren,
Are you saying there are no codes on the built-in light, or no codes
on any of the modules?
The built-in light pretty much only displays the codes that affect
emissions. There's all kinds of
Thanks Hendrik, I will try to get the numbers and bild month.
The regeneration valve/ERG I think I can find. Is the MAS the
throttle body, or is that a different component?
How/where do you find the idle speed controller?
Would any of these components possibly still have self-destructing
Schematic for the home-made tester is in post #3 of the thread I posted earlier.
http://www.mercedesshop.com/shopforum/showthread.php?t=107630
Gary Thompson
1995 E320
On Mon, Nov 10, 2008 at 8:02 AM, Loren Faeth [EMAIL PROTECTED] wrote:
No codes on the built in light.
How do you get other
The MAS is in the air intake tract, it basically measures the amount of
air being drawn into the motor and along with the other inputs tells the
injectors how much fuel to dump into the motor. Not sure about the idle
speed actuator in the M104 engine but it would appear that it is an all
in
Loren,
Are you saying there are no codes on the built-in light, or no codes
on any of the modules?
The built-in light pretty much only displays the codes that affect
emissions. There's all kinds of other stuff that will generate a code,
but not appear on the built-in LED.
Gary Thompson
1995
OK I am having a gander at the WIS and so far the MAS and regeneration
valve (which I understand the EGR valve to be) are looking like culprits
that can cause fluctuating idle.
The regeneration valve can be blocked off to eliminate it.
Also check that the vacuum hose from the regeneration valve
And what if the check engine light is not on?
Question is, did the funkiness happen straight after replacing the
harness and throttle body or was it fine for a while and then start to
do naughty stuff.
Perhaps it is a white car and is not happy with the choice of Prez.
Hendrik
Tom Hargrave
PROTECTED]
On Behalf Of Loren Faeth
Sent: Wednesday, November 05, 2008 11:53 PM
To: Mercedes Discussion List
Subject: [MBZ] E320 fuel/electronic question
94 E320, with new engine harness and a recently replaced throttle
body from a 96:
Runs fine until warmed up, but a little tendency to search
It was doing it before the throttle body transplant. Since the TB
had the old deteriorating insulation, it was generally believed to be
the culprit. It is possible the new used TB is causing the same symptom.
At 03:00 AM 11/6/2008, you wrote:
And what if the check engine light is not on?
very possible. Only way to really fix that is to have it rebuilt.
Loren Faeth wrote:
It was doing it before the throttle body transplant. Since the TB had
the old deteriorating insulation, it was generally believed to be the
culprit. It is possible the new used TB is causing the same
Nope, the 1994 was pre standard tester days. There is a test plug next
to the battery that will allow you to dump the codes stored in the
various computer subsystems. There's a built in LED for the check
engine light type functions (primarily emmisions) and standard banana
plugs for the others.
There are currently no error codes showing. No check engine
light. They may appear. My daughter has gotten very good at reading
them and clearing them.
At 10:50 AM 11/6/2008, you wrote:
Nope, the 1994 was pre standard tester days. There is a test plug next
to the battery that will allow
94 E320, with new engine harness and a recently replaced throttle
body from a 96:
Runs fine until warmed up, but a little tendency to search. (fluctuating RPM)
When warm, will die at stops, probably due to searching.
Any ideas what could cause this and how to test components other than
the
11:53 PM
To: Mercedes Discussion List
Subject: [MBZ] E320 fuel/electronic question
94 E320, with new engine harness and a recently replaced throttle
body from a 96:
Runs fine until warmed up, but a little tendency to search. (fluctuating
RPM)
When warm, will die at stops, probably due
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