Dynojet Air Fuel Ratio Module - Manual (Page 17)

U S I N G T H E A I R F U E L R A T I O M O D U L E
Air Pump Maintenance and Troubleshooting
Version 6 Air Fuel Ratio Module Installation and User Guide
2-7
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AIR PUMP MAINTENANCE AND TROUBLESHOOTING
This section contains sensor information and describes the procedures for
maintaining and troubleshooting the Air Pump Assembly.
Note: Make sure you are aware of the following items:
• The Air Pump Assembly has a one year warranty.
• Keep the air pump upright. Tipping the pump may result in damage to the
sensor.
• Leaks in the system will result in erroneous readings. Verify there are no cracks
or holes in the hoses and filter bowl. Verify the sensor is seated properly in the
sensor block.
• Do not allow the filter bowl to fill with water during operation.
S ENSOR I NFORMATION
The sensor is calibrated by Dynojet prior to shipping. Under optimal conditions, the
sensor life can exceed 1500 hours. When using leaded race fuel, 2.5 grams of lead per
gallon of fuel will reduce the expected life of the sensor to less than 100 hours.
The sensor is not covered by a warranty. Be sure to read and understand the Air
Fuel Ratio Module Installation and User manual.
C ORRECTING L EAN A IR F UEL R EADINGS
Refer to the instructions below if you are experiencing air fuel ratio readings that are
leaner than you expected.
1
Verify the pump is running.
2 Check the system for restrictions in the air flow such as a clogged filter or kinked
hose.
3 Verify the copper sample tube is not kinked or clogged and is inserted into the
exhaust as far as possible. Refer to Figure 2-1.
4 Check for leaks in the system.
4a
Verify all hoses are securely attached to the fittings.
Note: You may need to remove the pump head service cover and verify the hoses
are securely attached to the pump. Refer to Figure 2-8.
4b
Verify there are no cracks or holes in the hoses and filter bowl.
4c Verify the sensor is seated properly in the sensor block.