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Electrical "Cut-out" at high RPM's

Electrical and Electronic

Vehicle Information: Model: 911 Carerra cabriolet; Year: 1987; Body Type: Convertible; Engine (type, size, modifications): stock; Total Mileage: 71,000;

Greetings,I have been a member of PCA for several years but not been an active one. While perusing the PCA website today I came across an area that could be of great help to me. However, I do not know how to navigate within the website to get my information.Perhaps the best thing to do is ask 2 seperate questions:1) How do I learn what my login/passwords are to post a message in the Tech Q/A section of the website?2) Can you forward the following question to the moderator / facilitator of that section and ask either send me a response or post my message so others can provide me with feedback?My question:I own a 1987, 911 Carerra, cabriolet with 71,000 miles. Recently, when the car has been traveling at 4,000 RPM's for a sustained period (about 20 minutes), the electrical system completely shuts down...the engine stalls...all lights come on on the dash - creates a dangerous situation when on a highway.So far I have been fortunate. I've been able to coast to the side of the road where I wait approximately 5 minutes. At that point the car does restart and I'm able to drive. I have been reluctant to return to the 4,000 RPM after the car stalls once and drive at a slow speed to my destination.When driving in th city, I've also noticed recently that when I brake the car with any other than "soft braking" - the dash lights will blink. Same with cornering...anything more than slow speed cornering causes dash lights to blink (maybe related to engine stall, not sure).Recently, a friend suggested changing the DME relay which was done. The DME was not the answer as electrical cut-out occurred after the DME replacement. A mechanic commented it could be several things and the only way to find the problem is to start "changing out" other parts. I can not afford a "mechanical hunt" to find a solution to what appears to be an electrical problem.Can someone at PCA offer suggestions? Can PCA refer me to someone who can provide guidance?Thank you for your assistance. Sincerely,Mike Salokas

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