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©2004 Edelbrock Corporation
Brochure No. 63-0190 - DC/mc
Rev. 03/04
Catalog #70003 & #70004
Page 25 of 28
8.0 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 fuel solenoid 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.).
ii. Change fuel line routing.
b. Check Fuel Pressure.
i. Increase fuel delivery as needed.
c. Service the nitrous system fuel filter?
i. Replace/clean filter.
3. Malfunctioning fuel solenoid.
a. Turn arming switch on, engine off. Activate microswitch, listen for the solenoids to “click”. If no click is heard...
i. Repair/Replace solenoid.
ii. Check wire connections.
iii. Verify the power is on.
iv. Perform the wire “wiggle” test.
Symptom #2… Change in engine speed when nitrous bottle valve is opened.
1. Malfunctioning nitrous solenoid.
a. Repair/replace solenoid. See
“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.