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Registered
Join Date: Oct 2022
Posts: 1
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My First Porsche - A 1977 911S
Hi there,
Let me start by saying how stoked I am to be posting this. Beginning of the year I purchased my 1st Porsche a 77 911S from Gallery Junction a Car dealer in Orange California. I spent the next few months importing it to Australia,Got it running drove it home and it ran soaringly hot - consistently. Car was hard to start regardless of conditions, temp etc. I since had the motor stripped down and found two of the valves had worn stems and had carbon'd the valve stems so it had 0 compression on 2 cylinders. Heads all rebuilt, top end overhaul with a few little upgrades - Hydraulic cam chain tensioners etc. Fuel distributor & WUR overhauled, got the car running and is still a little hard to start. So... If the car is dead cold, it will start fine- not great. but fine If the car is at operating temp 210-250 The car will start fine. But, If the car is sitting at aprox 170 it does not want to start, unless I pull the air cleaner over off and prime the fuel system. I have cleaned injectors & Ordered fresh ones along with new fuel filter & fuel accumulator which im currently waiting for. If anyone has had a similar issue in the past they could perhaps shed some light on that would be great. Thanks! Nicholas. 
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10-31-2022, 02:08 AM
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Welcome to the 1977 2.7L club !
I have on occasional starting issues when hot but they seem ever so infrequent and never a complete stall. It looks like you’re in some hot climate than Calif. and wonder if your pressures and fuel mixture are set to accommodate the new environ. Proper #033 WUR rebuild installed ? Looks like you’re on to something by manipulating the Air Flow Sensor Plate … refer to this for some troubleshooting before replacing $$$ everything https://members.rennlist.com/vilhuer/K%20Jetronic%20Workshop%20Manual.pdf |
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10-31-2022, 11:46 AM
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Full Send Society
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Start here: CIS Troubleshooting for Dummies
You're having issues with the Bosch K-Jetronic CIS, it's a very simple and yet complicated system that will behave wonderfully for a very long time if maintained and kept within specifications. It's not hard to work on, there are plenty of folk here who will assist you through the process and even a few who can test the components and rebuild them if needed. If you work through the problem methodically you will be rewarded.
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-Julian 1977 911 S: Backdate, EFI/ITB, AC project in the works: http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html |
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10-31-2022, 12:37 PM
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Registered
Join Date: Dec 2008
Location: San Antonio, Texas
Posts: 3,590
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Apart fro your starting issues anything love 220 is too hot.
Get a front carrera cooler with a fan. Very nice looking car
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1973 911S (since new) RS MFI specs 1991 C2 Turbo |
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10-31-2022, 04:14 PM
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