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©2003 Edelbrock Corporation
Brochure No. 63-0173
Rev. 02/03
Page 23 of 23
Symptom #6… Engine detonates mildly when system is activated.
1. Inadequate octane fuel.
a. Verify what gasoline you use.
i. Use higher-octane fuel.
2. Spark plug heat range too high.
a. Verify what heat range the spark plug is, and how it functions in a high load, high performance
application.
i. Install a performance spark plug.
ii. Reduce spark plug heat range.
3. Too much nitrous flow.
a. Verify the size of the nitrous jet.
i. Install the proper nitrous jet.
b. Check bottle temperature and pressure.
i. Ensure before every nitrous usage that you only use nitrous when the temperature and pressure of your bottle
are correct.
Symptom #7… Engine detonates heavily when system is activated.
Inadequate fuel delivery due to:
1. Plugged fuel filter.
a. Inspect fuel filter.
i. Clean or replace filter.
2. Crimped fuel line.
a. Inspect fuel line.
i. Replace crimped line.
3. Weak or inadequate fuel pump.
a. Install fuel pressure gauge. Run engine under load at wide-open throttle, with system activated.
i. Repair or replace fuel pump.
ii. Install nitrous dedicated fuel supply.
Symptom #8… Vehicle surges under acceleration when system is activated.
1. Inadequate nitrous supply.
a. Weigh bottle.
i. Bottle should be 10 lbs. above empty bottle weight listed on bottle label when full.
b. Check bottle temperature.
i. Maintain 80 to 85 degrees of bottle surface temperature.
c. Check bottle valve.
i. Open valve fully
d. Check bottle orientation.
i. Mount bottle properly.