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 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.
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.
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 do you fix a stuck throttle cable?
Stick the end of the cable into a funnel and wrap electrical tape around it to create a seal. Spray or pour penetrating oil into the funnel. Position the opposite end of the cable over a small container to catch the penetrating oil as it drips out. Then lubricate the cable.
What kind of cable is a throttle cable?
Throttle Cable, Hi-Tech, Braided Stainless Steel, 36 in. Long, Universal, LS1/Ramjet, Each hrottle Cable, Black, 48 in. Long, GM, LS Each Throttle Cable, Midnight Series, Braided Stainless Wire, Braided Stainless Jacket, Black, Chevy, 5.7L LS, Each
Why is my throttle sticking on my dirt bike?
If your throttle is sticking and you’re still riding the dirt bike because you think the throttle’s operation is a mystery, or it’s going to be hard to fix.
Why is throttle return not as quick as it should?
If you don’t hear anything such as these noises, or you just have a feeling that the throttle return is not as quick as it should be, keep reading and I’ll show you how to diagnose and remedy the situation. If you EVER notice any damage to a throttle cable, Never try to cut frays off or “rig” a throttle cable in any way.