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 SmileWavy around 10 minutes to restart the car. When the motor run , it doesn't correctly until the hot temperature. after it's ok

4 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

I will try to help, given what you've posted.

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.

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