Uploaded December 2025 | Updated September 2026, 3 weeks ago

---

Avoiding common mistakes is the key to getting the best out of your Holley Sniper 2 EFI. In this video, we break down the Top 10 installation and setup pitfalls—from wiring errors and bad O2 sensor placement to fuel pump mounting, timing, and IAC adjustments. Even seasoned DIYers can get tripped up, but with these tips you’ll save yourself headaches, wasted time, and performance issues. Watch now and make sure your Sniper 2 runs like it should.

0:00 Common Sniper 2 mistakes and how to avoid them
0:47 Follow the Setup & Installation Instructions
1:18 Improper Wiring
2:24 Improper Grounding
2:44 O2 Sensor Placement
3:38 Clogged or Failing Injectors
4:33 Fuel Pump Mounting
5:26 Setting Your Timing
5:46 Vacuum Leaks
6:14 Idle Air Control Adjustment
7:04 Non-O2 Safe Sealants or Additives

Learn More:
holley.com/support/fuel_injection/sniper_2_efi

holley.com/products/fuel_systems/fuel_injection/sniper_efi/sniper_4-barrel_systems

Follow us on social media:
Instagram: @HolleyPerformance
Facebook: facebook.com/HolleyPerformance