Do Volvo injectors need coding?
These injectors do not require coding as such, they do however need to be of the same class. There are class 1 2 or 3. If 2 or more are a different class the car will not run correctly.
What do injector cups do?
The injector cup seals the cooling system from the injector inside the cylinder head. When the injector cup fails, you will no longer have a seal between the fuel system and the coolant system. Because of the higher pressure of the fuel system, the fuel goes into the coolant.
Why does my Volvo injector Cup not seal?
When the combustion gas gets in the fuel, the injector is not sealing against the injector cup allowing combustion gas to come up past that sealing point and get into the fuel gallery. The most common symptom is hard starting or extended crank time. Other symptoms can include low fuel pressure and low power
Why is the injector not sealing against the fuel Gallery?
When the combustion gas gets in the fuel, the injector is not sealing against the injector cup allowing combustion gas to come up past that sealing point and get into the fuel gallery. The most common symptom is hard starting or extended crank time. Other symptoms can include low fuel pressure and low power.
How do you test for a faulty injector Cup?
The more accurate test is to fit a clear fuel line on the in line to the head and inspect for bubbles to rule out the fuel system before the head. Then fit a clear fuel line on the return line coming out of the head. If you see bubbles after the head and not before you have confirmed faulty injector cups.
Why does my fuel injector need to be replaced?
The most common symptom is hard starting or extended crank time. Other symptoms can include low fuel pressure and low power. The injector often needs to be replaced because the sealing surface is damaged. A quick indicator of air in the fuel system is to look in the fuel tank for bubbles at the return line.