How often do you change the spark plugs on a Porsche 911?
This guide goes through the steps we used to replace all six spark plugs on a Porsche 911 (991.1). Porsche states to replace spark plugs every 4 years, or every 40,000 miles (60,000 kms). Change the spark plugs on Porsche’s flat six engine is not any different than any other engine. The difficulty is gaining access to all of the spark plugs.
How does the fuel filter work on a Porsche 911?
Fuel is pumped from the tank to the fuel injection system, and then the excess is returned back to the tank through a return line. This process of recirculation keeps the fuel pressurized in the lines so that it doesn’t have a chance to evaporate.
How does CIS system work on Porsche 911?
The CIS system recirculates the fuel back to the tank, therefore a full tank will act like a large cooling center for the fuel. When you shut the engine off, you might want to try leaving the fuel pump running (turn the key one notch towards starting position) for a minute or two.
When did Porsche start using the fuel accumulator?
The fuel accumulator is part of the Bosch K-Jetronic system, or CIS, that was used on the 911 from mid 1973 thru 1983 and 911 Turbos up until 1989. The accumulator contains an internal spring-loaded diaphragm that prevents vapor lock by keeping the system pressurized after the engine has been shut off.
Fuel is pumped from the tank to the fuel injection system, and then the excess is returned back to the tank through a return line. This process of recirculation keeps the fuel pressurized in the lines so that it doesn’t have a chance to evaporate.
The fuel accumulator is part of the Bosch K-Jetronic system, or CIS, that was used on the 911 from mid 1973 thru 1983 and 911 Turbos up until 1989. The accumulator contains an internal spring-loaded diaphragm that prevents vapor lock by keeping the system pressurized after the engine has been shut off.
The CIS system recirculates the fuel back to the tank, therefore a full tank will act like a large cooling center for the fuel. When you shut the engine off, you might want to try leaving the fuel pump running (turn the key one notch towards starting position) for a minute or two.
Can a faulty fuel filter cause a 911 to warm up?
Place one wrench on the filter, and the other on the line. Using this method will reduce the probability that you might damage one of the lines, or the accumulator. Sometimes a faulty fuel accumulator will cause various warm-start problems on the CIS-equipped 911.