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©2002 Edelbrock Corporation
Brochure No. 63-0029
Rev. 12/02
Page 24 of 26
7.0 Troubleshooting Your Edelbrock Nitrous System
How to use our Troubleshooting Flowchart:
The troubleshooting of a nitrous system is basic and straightforward. The symptom chart is divided by symptom, cause and action
required. Determine your problem (symptom), identify the potential problem (cause) and correct the problem (action required).
Symptom #1… There is No change in engine speed when system is activated.
1. System wired incorrectly.
a. Compare wiring to schematic.
i. Wire per instructions. See
“Nitrous Electrical System Wiring Diagram” section.
2. Restricted fuel line.
a. Inspect fuel line for restrictions.
i. Remove restrictions (kinks in rubber line, pieces of rubber hanging in flow path, etc.).
b. Check Fuel Pressure.
i. Increase fuel delivery as needed.
Symptom #2… Change in engine speed when nitrous bottle valve is opened.
1. Malfunctioning nitrous solenoid.
a. Repair/replace solenoid. See
“7.0 Solenoid Inspection and Maintenance” section.
2. Contamination in nitrous solenoid.
a. Remove and inspect solenoid for dirt around seat area of plunger in solenoid.
Symptom #3… Engine runs excessively rich when system is activated.
1. Nitrous bottle valve not fully opened.
a. Check bottle valve.
i. Open valve fully.
2. Nitrous bottle mounted improperly.
a. Mount bottle properly. See
“Nitrous Bottle Installation” section.
3. Plugged nitrous filter.
a. Clean and/or replace nitrous filter.
b. See nitrous solenoid symptom #2.
4. Low bottle pressure.
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.
5. Voltage booster unit setting is too high.
a. Check clockwise - counterclockwise setting on potentiometer of voltage booster unit.
i. Adjust potentiometer to the correct setting recommended for the jetting being used.
Symptom #4… High RPM misfire when system is activated.
1. Excessive spark plug gap.
a. Inspect spark plugs.
i. Set plug gap at 0.030 – 0.035 inch.
ii. Contact the manufacturer of your plugs for more information.
2. Weak ignition/ignition component failure.
a. Inspect ignition components.
i. Replace worn components.
ii. Upgrade ignition system to high performance high load capable ignition components.