Will Arch

I have a 1977 Porsche 911 S Coupe in excellent condition....In the past three months I have changed the "points" on my Porsche 3 times...my mechanic has recommended and completed.... The problem that was happening was my Porsche would just cut off for no apparent reason at a stop light or low RPM's.......I feel the problem lies somewhere else....has anyone had this problem? Can you suggest a direction?

Thanks,
Will Arch

catuck

That sounds exactly like the problem I had. Turns out my points kept closing - the set screw wasn't holding the points open to the proper gap. My solution was to replace the points with an optical trigger from Crane Cams.

I am now upgrading to a 3.2 so I'll have no use for it. Its for sale if you're interested.

RoninLB

Chris.. I think Will is talking about a different problem. Probably about points pitting. the points should last many many miles without ever pitting on the '77. maybe an adjustment or timing adjustment once in awhile. I don't have the hard info in front of me, but if the problem is pitting it's probably a ground situation. might even be a points ground situation internally/ inside the dizzy. and if I ever replace the points/upgrade, I'll be checking the timing at each cylinder.

jlkline

I hope this isn't too simplistic, but are you running the AC when this occurs? This was a common problem with the after market air of this vintage, requiring an adjustment to the fuel mixture to rectify.

Will Arch

I am not using the A/C when my Porsche cuts off.....I also replaced the CD Box recently with a Permatune CD...could that item be faulty?

Thanks,
Will Arch

RoninLB

Will.. is the points being replaced because of pitting on the contacts????

Will Arch

Yes, my points are pitting and my Porsche shuts off at a light will idling! I also just changed the CD to Permatune if this info. helps!

Thanks,
Bill Archival

RoninLB

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Will Arch:
<strong>Yes, my points are pitting and my Porsche shuts off at a light will idling! </strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">I definately believe you have a ground problem somewhere..