When did Porsche 911 start using fuel injection?
In 1980, emissions requirements forced the introduction of an oxygen sensor into the system, which helped the engine to better run at the appropriate mixture level through the regulation of fuel pressure inside the fuel distributor. The two primary adjustments for the CIS are the idle speed and the mixture adjustment.
What was the purpose of the Porsche 911 CIS?
On the early 911s, the CIS didn’t even operate properly, until the car was warmed up. A hand throttle was a standard part of the car in order to facilitate easier starting and warm-up. On the later model CIS cars, the addition of the auxiliary air valve eliminated the need for the hand throttle.
Are there any projects for a Porsche 911?
This article is one in a series that have been released in conjunction with Wayne’s book, 101 Projects for Your Porsche 911. The book contains 240 pages of full color projects detailing everything from performance mods to changing your brake pads.
What should the idle speed be on a Porsche 911?
The idle speed is adjusted by allowing more air to bypass the closed throttle. Using a large flathead screwdriver, simply rotate the screw clockwise to reduce the idle, and counter clockwise to increase it. The idle should be set to be about 950 rpm. So what can go wrong on with the CIS? Plenty.
When did the Porsche 911SC Targa come out?
Beverly Hills, CA Here is a 1982 Porsche 911SC Targa Euro Spec featured with 80,006 miles on the odometer and matching numbers (Certificate of Authenticity copy included)…. More Add to Favorites More Offered By:Beverly Hills Car Club Advertiser since 2009 $48,500 1978 Porsche 911SC Coupe 17 Beverly Hills, CA
Is there a 1980 Porsche 911SC for sale?
This 1980 Porsche 911SC Targa featured here with matching numbers is available in its original color code#936 of metallic silver with a black interior…. More *1983 Porsche 911 SC Cabriolet* This is a 1-owner car! Very well maintained and cared for a long time. Rust and accident free. This… More
What are the numbers on a 1982 Porsche Targa?
1982 Porsche 911SC TargaThe 1982 Porsche 911SC Targa featured here with matching numbers and 93,115 1982 Porsche 911SC TargaHere is a 1982 Porsche 911SC Targa featured here with matching numbers and
What kind of car was the 1980 911?
1980 Porsche 911SCFlachbau Turbo Look ConversionHere is a 1980 Porsche 911SC Flachbau Turbo Look Co Porsche’s newest variant of the now well-respected 911 for 1979 was the 911 SC.
How does the CIS work on a Porsche 911?
The CIS meters the amount of fuel provided to the cylinders as a function of the air drawn into the engine. The CIS air flow sensor plate measures the amount of air that is being drawn into the system. This sensor plate is attached to a fuel distributor that evenly meters the amount of pressurized fuel sent to each injector.
In 1980, emissions requirements forced the introduction of an oxygen sensor into the system, which helped the engine to better run at the appropriate mixture level through the regulation of fuel pressure inside the fuel distributor. The two primary adjustments for the CIS are the idle speed and the mixture adjustment.
The CIS meters the amount of fuel provided to the cylinders as a function of the air drawn into the engine. The CIS air flow sensor plate measures the amount of air that is being drawn into the system. This sensor plate is attached to a fuel distributor that evenly meters the amount of pressurized fuel sent to each injector.
The idle speed is adjusted by allowing more air to bypass the closed throttle. Using a large flathead screwdriver, simply rotate the screw clockwise to reduce the idle, and counter clockwise to increase it. The idle should be set to be about 950 rpm. So what can go wrong on with the CIS? Plenty.
This article is one in a series that have been released in conjunction with Wayne’s book, 101 Projects for Your Porsche 911. The book contains 240 pages of full color projects detailing everything from performance mods to changing your brake pads.
Why does my Porsche 911 have a cold start?
Cold start problems can often be attributed to the thermo-time switch or the warm-up regulator. For more information than you will probably every need on the CIS, take a look at the book, “Bosch Fuel Injection & Engine Management” by Charles O. Probst.
Are there any problems with the Porsche 911 CIS?
Although the CIS has a reputation for reliability, it is also known for having a few characteristic problems. Warm and cold start problems are common, as well as backfiring and poor performance at startup. On the early 911s, the CIS didn’t even operate properly, until the car was warmed up.
Cold start problems can often be attributed to the thermo-time switch or the warm-up regulator. For more information than you will probably every need on the CIS, take a look at the book, “Bosch Fuel Injection & Engine Management” by Charles O. Probst.
Although the CIS has a reputation for reliability, it is also known for having a few characteristic problems. Warm and cold start problems are common, as well as backfiring and poor performance at startup. On the early 911s, the CIS didn’t even operate properly, until the car was warmed up.
Why do you need a hand throttle on a Porsche 911?
A hand throttle was a standard part of the car in order to facilitate easier starting and warm-up. On the later model CIS cars, the addition of the auxiliary air valve eliminated the need for the hand throttle. One of the most common problems for the older CIS cars is the existence of vacuum leaks.
What to do if your Porsche 911 engine wont start?
2. Remove the air cleaner cover and air filter, and spray some fuel into the intake. You will have to hold open the little “door” inside there with something. If it starts briefy then dies you probably have a fuel problem. 3. You can jumper a hot wire to the fuel pump and listen to it whir to prove that it’s working.
A hand throttle was a standard part of the car in order to facilitate easier starting and warm-up. On the later model CIS cars, the addition of the auxiliary air valve eliminated the need for the hand throttle. One of the most common problems for the older CIS cars is the existence of vacuum leaks.
Why does my Porsche 911 have a vacuum leak?
Any vacuum leaks will cause problems in regulating the mixture, and may also result in an uneven idle. To check for vacuum leaks, spray some carb cleaner or starting fluid around the hoses and injectors of the fuel injection system. If the engine idle increases, then you probably have a vacuum leak that needs to be tracked down.
Why is my Porsche 911 not starting properly?
Contrary to popular belief, the WUR regulates fuel pressure in the system at all times. Cars that experience difficulty adjusting the mixture on may be suffering from a defective WUR. This failure may also contribute to starting problems.
How to set idle speed on Porsche 911?
For details on setting the idle speed for your 911, make sure that you look at Projects 29-31, which are specific to each different type of fuel injection system. To properly set the timing, you may have to remove the vacuum hoses from the distributor.
Why is my Porsche 997 running rough idle?
Learn about some possible reasons causing rough idle here. This article applies to the Porsche 997 (991) (2005-2012). There are many reasons why your 997 may be running a little rough. Some may be as benign as old fuel if the car has been sitting, or it may be time to change your plugs and coil packs.
Is there a problem with my Porsche 911?
At one time or another, everyone will have problems starting their 911. It’s almost inevitable with older cars of any make, and Porsches certainly are not exempt. What do you do when the car won’t crank? There are a few steps and procedures that you can follow to track down the problem.
How do you change the timing on a Porsche 911?
The timing setting is changed by rotating the distributor slightly. Take a 13mm wrench, and loosen up the nut that holds the distributor secure to the engine case. While the engine is running and the timing light is shining on the pulley, gently rotate the distributor until the timing mark on the pulley lines up with the notch in the fan housing.