Hello all,

My buddy at the cadillac dealership called me on Saturday morning "hey we're slow up here, bring your car in and we'll detail it" Of course I agreed and I must say she is looking better than ever. When we started on the engine I suggested we do a dry cleaning, my buddy insisted that it would be ok, "we won't use much water" So I agreed. We sprayed the engine with cleaner (just the top of the motor) then lightly hosed it off and started the car, letting it run for about 15 minutes....car was fine all day until evening when it developed a miss. Now the miss is intermittend. It seems to be fine for a while if the car has been sitting for a good period. It usually starts when I come to a stop. It feels as though it goes from dropping one cylinder to dropping two.....I changed the plugs yesterday (needed it anyway) everything looked pretty dry and I'm pretty sure that water didn't get down in the plug holes since I made my buddy aware of the possible delima. Unfortunately the problem is still there. Anyhow if anyone has any suggestions I would appreciate the help....I was wondering if there was an issue with one of the coils since the problem seems to me as if it is affecting two cylinders at times.

Thanks for your help,
B-

__________________
Brandon



2008 S550
1957 Dodge D100
1967 VW Microbus 21 Window
2001 Suburban
2004 Beach cruiser bicycle
-----------------GO DUKE!-----------------

"It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776

Change the 3 plug connectors under the coils....
.. I assume you did not use plats ??????
Bosch F8DC4 plugs only on that engine/ignition system

Thanks for the reply Arthur. Correct I used the non resister bosch plugs F8DC4's. What makes you think the 3 plug connector under the coils are bad ? Not questioning your logic, just curious as to why just the 3 ?

Thanks again,

__________________
Brandon



2008 S550
1957 Dodge D100
1967 VW Microbus 21 Window
2001 Suburban
2004 Beach cruiser bicycle
-----------------GO DUKE!-----------------

"It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776

Known faullty parts , specially after they have been moved.
Cheap and recommended with plug change.
This ignition system is a waste spark , meaning two plugs fire in series ,
[ which is why only 3 coils for 6 plugs] so a bad connector can affect two cylinder misfires. The connectors on the other plugs do not suffer the heat encapsulation the coil ones do, and they also have a snap connector, whereas the coil onder ones are a friction/pressure spring fit [ not to anyones liking]
So the others do not have the common fail rate as the three I recommend changing.
Newer systems have coils on each cylinder .
That's why...
http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1D00YU6RY1IL0R2S31&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1997&product=F1010-84561&application=000357357
More details in the archives on these ... enough to fill a NYC phone book.. (:

Thanks for the detail explination Arthur !! Makes perfect sense. I'll change those asap.

Any Idea what I could have gotten wet to cause this problem initially ? I'm 98% positive that we didn't use enough water to get down around the spark plugs. Any connectors that I should pay attention to ? or disconnect and spray with compressed air ?

B-

__________________
Brandon



2008 S550
1957 Dodge D100
1967 VW Microbus 21 Window
2001 Suburban
2004 Beach cruiser bicycle
-----------------GO DUKE!-----------------

"It cannot be emphasized too strongly or too often that this great nation was founded not by religionists, but by Christians; not on religion, but on the Gospel of Jesus Christ. For that reason alone, people of other faiths have been afforded freedom of worship here." Patrick Henry 1776

The connectors usually just give trouble regardless of water shorting cuz of the connector design.. Techs always just change them out with plug change just to eliminate the possible misfires they are known to cause and the low cost.... they are not just a connector, they are also a RF resistor .. that is why we don't want resistor plugs coupled with the resistor connector .. the resistance is in the connector....
Post the results for the benefit of others watching this post, if you could,,,