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I'm here to cause trouble
Join Date: Mar 2005
Location: CA
Posts: 935
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Carrera distributor cap wear
I started getting an occasional miss and stumble at the low end - popped the cap and saw this ... rotor was down tight.... is this common?
 JB
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'86 Carrera Cabriolet '73 911T Sporto (RIP) '90 Miata LeMons Contender! '71 Datsun 510 (RIP) '67 Fiat 124 Sedan (RIP) '72 Ford Pinto (RIP) '62 Plymouth Valiant '60 Ford Galaxy 500 (RIP) |
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03-27-2011, 09:48 AM
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I don't know if it's common but I think you found your miss. How's the rotor look?
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1974 sahara beige 911 targa 1982 chiffon 911sc 1985 prussian blue metallic carrera |
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03-27-2011, 10:18 AM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,556
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I saw that same thing last summer on someones race car..
Bruce |
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03-27-2011, 10:53 AM
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too much, for sure..
Doyle
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Recording Engineer, Administrator and Entrepeneur Designer of Fine Studios, Tube Amplifier Guru 1989 Porsche 911 Carrera Coupe 25th Anniversary Special Edition Middle Georgia |
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03-27-2011, 01:00 PM
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muck-raker
Join Date: Jan 2009
Location: Coastal PNW
Posts: 3,059
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not common, but definitely f'ed up. You found your problem.
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STONE '88 Cabriolet, using EP Slick 20w50 partial synthetic Snake Oil...just as Rommel intended.  Deny Everything; Admit Nothing; and Always Make Counter-accusations 
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03-27-2011, 03:39 PM
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Join Date: Aug 2002
Location: Galivants Ferry, SC
Posts: 10,550
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Might be good to know if these are the replacement "Bosch" pieces made in Spain, Yugoslavia, or wherever. Isn't the center post a bit "Springy"...and does the spring still work?. Does it look like mechanical or electrical distress up-close?.....forensic minds want to know !!.
.... 
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Wil Ferch 85 Carrera ( gone, but not forgotten ) Last edited by Wil Ferch; 03-27-2011 at 05:32 PM.. |
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03-27-2011, 05:03 PM
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Join Date: Jun 2004
Location: Los Alamos, NM
Posts: 390
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How many miles on that cap?
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Scott Wilburn 1988 911 Carrera 3.4 L 1998 M3 1984 308 QV |
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03-27-2011, 05:05 PM
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I'm here to cause trouble
Join Date: Mar 2005
Location: CA
Posts: 935
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Not a lot of miles - maybe 12K. I popped in a new one (made in Spain.. not sure about the damaged one) and had a closer look at the old one. The light colored area seems to be where the cap melted as the electricity tried to find a path.
The carbon rod looks like it might have broken off. I'll take a closer look when I can... Anyhow, runs much smoother now... so... new plugs, new cap, can of fuel system cleaner working it's way thru the system... we'll see if I pass smog in the next week or two, or even come close! JB
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'86 Carrera Cabriolet '73 911T Sporto (RIP) '90 Miata LeMons Contender! '71 Datsun 510 (RIP) '67 Fiat 124 Sedan (RIP) '72 Ford Pinto (RIP) '62 Plymouth Valiant '60 Ford Galaxy 500 (RIP) |
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03-27-2011, 05:59 PM
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John W
Join Date: Mar 2009
Location: Albuquerque
Posts: 275
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About 15k miles is time to change so you were getting close to it.
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----------------------------------- John 89 3.2 Targa 123k miles |
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03-27-2011, 08:05 PM
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Distributor cap...
I recently ordered a Beru cap from Pelican for my 3.0 SC, and it appeared to be better finished (made in Germany as well) than the last Bosch (made in Spain) unit I bought.
It's also significantly cheaper (for a Carrera) than the Bosch distributor. |
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03-27-2011, 08:56 PM
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Join Date: Oct 2006
Posts: 315
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I had the same problem on my 73S. After a few hundred miles I heard a ticking noise and thought it was a valve tick or a spark plug wire. Turned out that a piece of the carbon rod broke off and was bouncing around. At first I thought that the rotor or cap was not seated properly. Then after a few miles on a new cap and rotor, which was properly seated , I noticed that the rotor had shown a slight meltdown. I have MSD and installed a VW Beetle rotor(Jeff Higgins way) and no problems yet.
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03-28-2011, 04:22 AM
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1974 Porsche 911 targa 2.7
