About Fuel Injection
Fuel injection is a sophisticated system that controls the delivery of the fuel. It can be found on almost all new cars currently produced. The reasons why modern everyday cars are being fitted with fuel injection over carburetors are. Lower Levels of Pollution Increased Performance Lower Fuel Consumption

What do injectors do?
Injectors are designed to deliver small, precise amounts of fuel into the engines inlet manifold. To accomplish this, fuel is forced into the injector and a measured delivery is sprayed out through a nozzle that may be as small as 0.002 of an inch. The valve may only be open for a period of 2 milliseconds.

Symptoms of Injector Problems:
Lack of Power:The vehicle has lost its performance.
Poor Fuel Economy:The vehicle uses excessive fuel.
Excessive Exhaust Emissions:The vehicle fails local emission testing.
Hard Starting: The car is difficult to start hot or cold.
Rough Idle:The car does not idle smoothly.
Poor Drivability: The vehicle suffers from hesitation.

What can I do about these injector problems?
The minimum life expectancy of an injector is, 1 Billion pulses, well within the life expectancy of the car. The normal approach from main dealers is to replace them. This is a very expensive method of solving the problem, as the injectors can cost between $100 - $250 each. Injectors do not have to be replaced. They can be cleaned both inside the fuel passage and outside around the seat and pintle head with the Ultrasonic Injector Cleaning and Testing Bench we use here at Doctor Injector.

What alternative cleaning methods are there?
There are various options available, some are tank additives, some are on car cleaning, but none can match the results that Doctor Injector offers with our off the car testing on the flow bench. Only with off the car system cleaning, such as used at Doctor Injector, can the final results be seen, measured and compared with the pre clean Flow Rates and Spray Patterns.

What are the results like?
Tests have shown that 97% of injectors will respond to the off car (Doctor Injector) method of cleaning. The small percentage of injectors that will not respond to cleaning will have either mechanical damage to the pintle or some internal component like the pintle return spring, or electrical damage to the solenoid windings. The biggest failure of injectors is RUST, caused by water contamination in the fuel system. To determine whether the injectors are working correctly they must be tested for LEAKS, SPRAY PATTERNS, and FLOW RATES over a range of engine speeds and millisecond injector opening times. After cleaning, the injectors are tested again.