Petrol injector specialist
Petrol injector service specialists: cleaning, testing & flow matching
Restore engine performance, fuel efficiency and smooth running with professional petrol injector cleaning, ultrasonic cleaning and flow testing. Simms Diesel provides accurate injector testing and servicing for petrol engines across Auckland and Northland.
Why choose Simms for petrol injector servicing
Petrol injector specialists
We specialise in testing, cleaning and servicing petrol fuel injectors for improved engine performance and fuel efficiency. Our workshop equipment ensures accurate testing and reliable results for petrol vehicles and performance applications.
Ultrasonic cleaning & flow testing
Petrol injectors are cleaned using ultrasonic equipment to remove carbon and fuel deposits, then flow tested to ensure correct spray patterns and balanced fuel delivery across all injectors.
Restore performance & fuel economy
Blocked or dirty injectors can cause rough running, loss of power and poor fuel economy. Servicing injectors helps restore proper fuel delivery, improving engine performance, efficiency and reliability.
Testing & quality assurance
All petrol injectors are tested for leakage, electrical operation and flow consistency to ensure they meet specification before being returned to the customer or refitted to the vehicle.
Losing power? Burning more fuel than usual?
Petrol injector problems can cause rough idling, hesitation, poor acceleration and increased fuel consumption. Over time, injectors can become clogged with carbon and fuel deposits, affecting spray patterns and engine performance. If you're experiencing any of the following symptoms, your petrol injectors may need cleaning, testing or servicing.
Common signs your petrol injectors may need servicing:
- Rough idle or engine misfire
- Loss of power or hesitation when accelerating
- Increased fuel consumption
- Hard starting or extended cranking
- Poor throttle response or uneven engine performance
Request a petrol injector service
- Typical response time: same business day
- NO-OBLIGATION assessment
- Experienced diesel technicians
- Auckland workshop
Tell us your vehicle, injector type and symptoms — we’ll recommend the most cost-effective cleaning, testing or repair solution.
Frequently asked questions
Clear answers to common questions about petrol injector cleaning, testing and turnaround.
09 579 1159How long does petrol injector cleaning take?
Petrol injector cleaning and flow testing is usually completed within 1–2 business days depending on workload and injector condition. Urgent jobs may be able to be prioritised — contact us to discuss turnaround time.
Can I courier my injectors in?
Yes — courier-in repairs are common. Pack the parts securely and include your contact details along with notes describing the symptoms or performance issues.
Do you test injectors before cleaning?
Yes. All injectors are tested for flow rate, spray pattern, leakage and electrical operation before and after cleaning to ensure they are operating correctly and balanced.
Where is your workshop?
You’re welcome to visit our Auckland workshop and showroom at:
77 Leonard Road, Penrose, Auckland 1060
We also support courier repairs nationwide.
Do you clean and service all injector types?
We service most petrol injectors including standard road vehicles, performance injectors and some direct injection injectors. Contact us with your injector details to confirm compatibility.
What are the signs my petrol injectors need cleaning?
Common signs include rough idle, loss of power, hesitation when accelerating, increased fuel consumption, hard starting and uneven engine performance.
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