Marine Fuel Injector Service

Marine EFI Fuel Injector Cleaning and Flow Testing

Boats do a lot of sitting in the off season, be sure your injectors are working their best before you head out and find yourself in the middle of a lake.

Standard service: 2-4 business day turn-around time with flow sheet – $40 per injector 

Step: 1 is to complete the CPR RACING Cleaning & Inspection Form, You will find it HERE. Please remember to input the correct telephone number, email, and return shipping address for your injectors when submitting this form.

Step: 2 Make sure all fields are complete..

What do we do?

At CPR Racing, here’s what we do when testing and cleaning your injectors:

1. We subject your injector to RPM ranging from 500 to 10,000 to test its performance and resilience.
2. We perform a back flush on the injector.
3. We use ultrasound technology for further cleaning.
4. If your injector has a filter, we remove it and replace it with a new one. In cases where the injector doesn’t have a filter, we perform a back flush instead.
5. A resistance test is conducted to ensure the injector meets the OEM specifications.
6. You will receive test results both before and after our cleaning and testing processes.
7. If any injector fails to meet the OEM specifications and doesn’t flow properly, we offer to sell you a new one.

How do you know if your injectors need cleaning?

Vessel symptoms of dirty fuel injectors may include:

• Hard starting
• Rough idle
• Wide-open throttle “WOT” hesitation
• Pre-ignition (sometimes heard backfire in the intake)
• Poor overall performance
• Decreased gas mileage

Performance of the vessel engine:

• Lean
• White on your spark plug
• No “WOT” fall on its face

What do we do when we receive your fuel injectors? 

STEP 1:  Testing

• Conduct inventory of injectors received
• Conduct visual inspection of any missing and/or damaged parts
• Run a full auto test (automatic diagnostics)
• Observe spray pattern
• Check the factory flow rate and confirm the data to OEM standards by Bosch
• Coil test (Ohm testing)
• Measurement of flow rate
• Inspect flow data
• Inspect for leakage and cracks
• Now we have your baseline before rebuilding

STEP 2:  Cleaning

• Clean outside surface of injectors
• Remove fuel filter basket and place in Ultrasonic Bath (UB)
• Ultrasonic bath:
  • A process that uses ultrasound usually from 20–400kHz an appropriate cleaning solvent to clean fuel injector.  Cleaning normally lasts between 20 minutes, E85, and others will exceed 90 minutes or more.

After UB, begin the test:

• Re-flow injectors for a new baseline
• Get flow data with a clean fuel injector
• Install CPR RACING new high flow filter basket
• Look at the spray pattern and open and close the spray pattern

STEP 3:  Final Test

• Flow Test again to get data
• Measurement to LBS and/or CC
• Collect data input in CPR RACING flow sheet

Q & A:

Question:  Would I receive a Flow Data-Sheet of my injectors from CPR RACING?

Answer:  Yes

• Flow data from the 1st test
• Flow data after cleaning
• Flow data-sheet will show you the LBS and/or CC
• You will see the comparison between before and after

Question:  What does CPR RACING replace?

Answer:  Filter Basket, O-rings, Pintle caps, and spacers

• Pintle caps:
• If injector Pintle caps are damaged or cracked, we will replace them