[W126 Coupe] HELP! resistor vs. non resistor plugs

[Gary]

for what it's worth, i got my bosch regular plugs from auto zone.  you can access there website and place your order.  i bought mine for 99 cents each.  they were on sale.

"Shayegan, Richard" <rishayegan at davidson.edu> wrote:You know, in the future, to avoid waiting, just go down to you local
ealer for plugs. It's one part they tend not to overcharge for.
Richard

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Tom Oelsner
Sent: Wednesday, September 21, 2005 10:55 PM
To: Mercedes Coupes Mailing Lists
Subject: RE: [W126 Coupe] HELP! resistor vs. non resistor plugs

I ordered the non resistor plugs this evening and they will have them
for me
Friday. The Rapid Fire caps do not unscrew. They are 1 piece.
Tom

-----Original Message-----
From: mbcoupes-bounces at mbcoupes.com
[mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of Mister McGoo
Sent: Wednesday, September 21, 2005 6:24 PM
To: mbcoupes at mbcoupes.com
Subject: RE: [W126 Coupe] HELP! resistor vs. non resistor plugs


Tom;

I didn't see anyone reply to you. (Maybe I missed it.)

DO NOT USE RESISTOR PLUGS. The resistance is already designed in.

Bosch specifies a spark gap of .032 throughout, not .040.

If you can't find Bosch plugs anywhere, you can use foreign plugs like
Champion N 12 Y, or cross reference to NGK.

I'd try .035 +/- if you are burning oil.

If you have the AC Rapid Fire #4 plugs are you sure the cap doesn't
unscrew
from the lead stem? Use pliers gently to try unscrewing. I have never
used
them and have no information on them. Obviously someone here has used
them
and thinks they are slicker'n snot.

If you have a Mercedes Benz Dealer in the vacinity, and if you are ever
unsure of what you are being told, try asking the service people there.
Don't be shy. Remember, you are a potential customer for them. If they
refuse to go out of their way to help find your answers, Mercedes Benz
want
to know about it! I know. (Just don't try it every second day.)

-Bellamy



>From: "Tom Oelsner" 
>Reply-To: Mercedes Coupes Mailing Lists 
>To: 
>Subject: [W126 Coupe] HELP! resistor vs. non resistor plugs
>Date: Wed, 21 Sep 2005 17:14:21 -0700
>
>This afternoon I replaced my plugs to see if I could smooth out my idle
>that
>occasionally ran a tiny bit rough. RH...you cannot use Rapid Fire #4
plugs
>as they have a one piece top that does not mate with the Bosch wires.
>Also,
>AC Delco says do not use any anti seize lube on threads...
>
>So here is my problem. The parts store did not have W9DC plugs in
stock
>but
>had WR9DC (resistor built in). I queried him really hard about them
and he
>said they would be fine and would not impact performance. So I gapped
them
>to .040 and put in new ignition wires (even though the old ones were
only a
>year old, I broke one pulling it. So I replaced all.). Well the car
idles
>really badly. This is in spite of the fact that 3 of the older plugs
were
>really fouled. So my question is obvious. Are the resistor plugs
causing
>rough idle problems?
>
>Tom Oelsner
>90 560SEC
>
>
>The MB Coupes Website!
>W126 SEC Mailing List
>Postings remain property of MB Coupes, L.L.C.


The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.


The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.
The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.

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