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Fuel injectors make up a major part of a vehicle. These are electromechanical valves responsible for delivering gasoline into the engine following a precise engineered pattern. These injectors should be able to last as long as the car does, but as with any crucial parts, signs show up at one point or another that tell you your car would need some replacements or repairs.

Fuel Injector

From the intake manifold, fuel injectors have moved to the combustion chamber, making them more precise in dispensing fuel. Any fuel or electrical problems can lead to drivability challenges. An article from Automotive Aftermarket Suppliers Association (AASA) presented a list that show when it’s time to replace your fuel injectors, or when service is needed. Here’s an excerpt of the article:

A restriction of only 8%-10% in a single fuel injector can lean out the fuel mixture and cause a misfire. When this occurs, unburned oxygen enters the exhaust and makes the O2 sensor read lean. On older multiport systems that fire the injectors simultaneously, the computer compensates by increasing the “on” time of all the injectors, which can create an overly rich fuel condition in the other cylinders. Direct fuel injectors are more sensitive to restrictions because of the precise amount of fuel they inject into the combustion chamber.

Dirty injectors are dangerous as they may cause detonation in the engine with the high exhaust temperature and turbo failure. Shutting off the engine affects the fuel residue as it disables airflow to move through the ports. The deposits that eventually build up clog the fuel injectors, and when blockage occurs, the injectors won’t be able to deliver the normal dose of fuel required by the vehicle, which can cause the system to misfire.

When the solenoid—which pulls up the injector pintle—is short and has excessive resistance, it can cause a drop, or shut down. Leaks in the injectors can cause the rail to lose pressure. Fuel contamination will cause the car to lose power and stall, or make it harder to start.

All these instances can occur if regular maintenance for the car is not followed—standard check-ups for oil changes and filter replacements, among others. Fuel injectors must undergo an injector balance test, and the O2 sensor must be checked for any indication of changes in voltage. Find out if your fuel injectors need cleaning or replacement by consulting with experienced fuel injector cleaner mechanics who can also recommend the right fuel injector cleaner to use for your car.

If you’re a professional mechanic or a regular car fanatic that understands how to work the systems under the hood, ensure your own hand and skin hygiene care by cleaning up with trusted sanitizers, such as the antimicrobial and sanitizing agent Gojo hand cleaner—a formula used by mechanics to remove grease and oil from the skin.

(Source: When to Replace a Fuel Injector, Automotive Aftermarket Suppliers Association)

Posted on Dec 10, 2014

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Kenny Isbell

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