- 800-381-2065
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- 9675 Southwest Freeway, Houston, TX 77074
- Monday – Friday: 8 AM – 4 PM (Central)
Current Turnaround Times
Standard Service – 3-4 Business Days
Expedited Service – 1 Business Day
Last Updated 11/8/25 at 12:55pm
Standard Service – 3-4 Business Days
Expedited Service – 1 Business Day
Last Updated 11/8/25 at 12:55pm
Experiencing engine misfires, rough idling, poor fuel economy, or difficulty starting your vehicle? These are some of the most common symptoms of faulty fuel injectors, which can lead to decreased performance and costly repairs if left unaddressed. At InjectorRx, we specialize in diagnosing and resolving fuel injector issues, whether they stem from electrical failures, clogged or dirty injectors, or leaking seals. Understanding the root cause—whether it’s debris buildup restricting fuel flow or a failing injector coil disrupting combustion—can help you take action before bigger problems arise. Explore our expert insights on fuel injector symptoms and solutions to keep your engine running smoothly.
If you see one or more of these symptoms, it may be time to send us your injectors. These symptoms could be caused by injectors that are bad, faulty, dirty, clogged, or leaking.
The symptoms above could be linked to one or more of the problems described below. We can help identify and fix the exact problem using our proprietary cleaning process and expert flow testing and flow matching services.
Diagnosing a clogged injector is not always easy. They act the same as a bad coil, a broken spark plug wire or a bad spark plug, where one ore multiple cylinders are not firing.
Old fuel, carbon and residue inside the fuel cause fuel injectors and/or their filter baskets to become clogged. A fuel injector is considered to be clogged if the amount of debris or gunk inside the injector or filter basket has built up to such an extent that it does not allow fuel to flow through.
Once the injectors themselves or the filter baskets becomes clogged, no amount of intake or fuel rail induced injector cleaner will resolve the problem. The only and most effective way to deal with a clogged fuel injector is to remove it from the engine and have them professionally cleaned.
Fuel injectors are considered to be dirty when the hydrocarbons and additives – present in all of today’s fuels – together with engine gunk and carbon, cause the injectors to become restricted. Fuel injector flow rates, atomization and distribution are affected and this can cause all sorts of drive-ability and performance problems.
Although there are some quality fuel injection cleaners that might help to keep your fuel injectors in good shape in the short term, the only true and tested way to clean fuel injectors properly is and has always been to do it outside of the engine and with the proper cleaning equipment. This process is inexpensive and has saved our customers thousands of dollars.
In most cases, dirty fuel injectors do not have to be replaced with expensive new fuel injectors. Your old injectors can be reconditioned to operate at the same level as new ones. And if we find that your injectors are bad and cannot be restored, you don’t pay us a dime.
A faulty fuel injector can cause serious engine performance issues, often mimicking problems with the ignition system or fuel pump. Unlike clogged or dirty injectors, faulty injectors suffer from electrical or mechanical failures, leading to inconsistent or failed fuel delivery. Common symptoms include rough idling, poor acceleration, excessive fuel consumption, or even a dead cylinder.
Mechanics diagnosing injector issues often find misfire-related trouble codes, uneven fuel trims, or unbalanced cylinder performance. Electrical failures can prevent an injector from opening or closing properly, while mechanical issues like internal wear or broken springs can disrupt fuel atomization. In some cases, an over-fueling injector may cause black exhaust smoke, fouled spark plugs, or a strong fuel odor.
If an injector is suspected to be faulty, the best solution is to remove it for proper testing. Many faulty injectors can be restored to like-new condition through professional cleaning and reconditioning. If an injector is beyond repair, we ensure you won’t pay for a service that can’t fix the problem, helping you avoid unnecessary replacement costs.
A leaking fuel injector can lead to serious engine performance issues and even pose a safety risk. When an injector leaks, it allows fuel to escape where it shouldn’t—either externally around the injector seals or internally by dripping excess fuel into the cylinder. This can cause hard starting, rough idling, fuel odors, or even black smoke from the exhaust due to an overly rich fuel mixture.
Mechanics often diagnose leaking injectors by checking for fuel smells, wet spots around the injector, or excessive fuel in the combustion chamber. A leaking injector can also cause oil dilution, leading to engine wear over time. Left unaddressed, a fuel leak can increase the risk of fire or severe engine damage.
The best way to fix a leaking injector is to remove and inspect it. In many cases, replacing seals or reconditioning the injector can resolve the issue, saving you from costly replacements. If the injector is beyond repair, we ensure you won’t pay for an ineffective service, helping you get back on the road safely and efficiently.
While many fuel injectors can be restored through professional cleaning and reconditioning, some injectors are simply beyond repair. When an injector has suffered internal damage, severe electrical failure, or excessive wear, it can no longer function properly and must be replaced. Symptoms of a completely failed injector include persistent misfires, a dead cylinder, extreme fuel consumption, or the inability to start the engine.
Mechanics diagnosing bad injectors often find injector circuit failure codes, erratic fuel delivery, or injectors that fail flow and resistance tests. In some cases, cracked injector bodies, broken internal components, or irreversible corrosion make repair impossible. A bad injector can cause long-term engine damage if left unchecked, making timely replacement crucial.
If your fuel injector is beyond repair, we provide expert guidance on sourcing the right replacement to restore your engine’s performance. Our goal is to help you avoid unnecessary costs while ensuring your vehicle runs efficiently and reliably.
Our fuel injector cleaning services start at just $22 and we will have your injectors cleaned, flow tested, flow matched, and on their way back to you in as little as 1 business day.
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InjectorRx restores engine performance with professional fuel injector cleaning, flow testing, and rebuilding services. We clean, test, and balance injectors for cars, motorcycles, and marine engines.
Enjoy improved power, fuel efficiency, and fast turnaround with expert service.