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Registered User
Join Date: Dec 2010
Posts: 78
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problem with CIS injection 1977
Hello
i need help. i have a 911 2.7 S equiped with CIS injection . The car don't start correctly when the motor is not fully hot : 1 I start the car at cold without major problem 2 When the motor is hot , i stop the car and let it around 1 hour 3 When i try to start it's very long  around 10 minutes to restart the car. When the motor run , it doesn't correctly until the hot temperature. after it's ok4 When the car is hot and i stop it and restart immediatly the motor start correctly. If somebody could help me it would be great Thank you in advance |
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05-12-2011, 06:22 AM
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Registered
Join Date: Oct 2005
Location: Capistrano Beach, Ca.
Posts: 7,235
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Quote:
From what you posted in #3--it takes a long time to restart the car after running warm and sitting--sounds like you are losing residual fuel pressure. This is usually due to a faulty check valve in the fuel pump, a leaking fuel accumulator, or a leak in the pressure relief valve in the fuel distributor. What you need to do is test the fuel pressures of your CIS system, using a fuel gauge set (lots of threads here on how to do that) and test to see your system holds pressure after shut down. I did not go into how to do the testing procedures as I don't know how familiar you are with the workings of the fuel injection system and I don't want you to feel overwhelmed. Please post any questions and someone will guide you step-by-step through the procedure.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip |
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05-12-2011, 06:51 AM
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Registered User
Join Date: Dec 2010
Posts: 78
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thank you for your help. i have another accumulator on another car ( carrera 2.7 ) i check with it if it's better.
thank you René |
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05-12-2011, 07:17 AM
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