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Catalog #70403
Brochure No. 63-0147
©2003 Edelbrock Corporation
Rev. 1/03
4. Malfunctioning arming switch.
a. With ignition "on", turn arming switch "on." Connect test light to battery "-" (negative) terminal.
Check for power at terminal #1 wire on arming switch.
b. If power is present, replace arming switch.
5. Malfunctioning microswitch.
a. Turn arming toggle "off". Close throttle microswitch, check for continuity between microswitch
wiring terminals.
b. If continuity is present, replace microswitch.
6. Inadequate nitrous supply.
a. Weigh bottle.
1. Bottle should be 10 lbs. above empty bottle weight listed on bottle label when full.
b. Check bottle pressure.
1. Maintain 900-950 psi for optimum system performance.
c. Check bottle temperature.
1. Maintain 80 to 85 degrees of bottle surface temperature.
d. Check bottle valve.
1. Open valve fully.
e. Check bottle orientation. Refer to “Bottle Mounting Orientation” section.
1. Mount bottle properly.
7. Incorrect nitrous jetting.
a. Compare jetting to recommended values. Refer to “Jet Map Information” section.
1. Install correct jets
b. Verify the number stamped in the jet.
1. Acquire the right size jets and install correct jets.
8. Loose nitrous solenoid wiring.
a. Inspect solenoid wiring. Refer to “Nitrous Electrical System Wiring Diagram” section.
b. Repair wiring as necessary.
9. Malfunctioning nitrous solenoid.
a. Inspect solenoid wiring. Refer to “Nitrous Electrical System Wiring Diagram” section.
1. Repair wiring as necessary.
b. Inspect solenoid. See symptom # 2.
1. Rebuild/replace solenoid.
Symptom #4… Engine detonates mildly when system is activated.
1. Excessive ignition timing.
a. Check Timing.
1. Reduce timing in 2-degree increments for every 50 hp.
2. Inadequate octane fuel.
a. Verify what gasoline you use.
1. Use higher-octane fuel.