Saturday, January 3, 2026

Holley Sniper Stealth EFI - Part 7 (Temporary Wiring)

My most recent work with the Mustang has been to complete my temporary wiring of the Holley Sniper system.  This included running a pink wire to the back of the ignition to get consistent ignition power, connected to the negative side of the coil, and then connected the tach input to the Sniper system.  I made not attempt to clean up the wiring but more to set it up in a way that I can temporarily zip tie it so that I'm able to drive the vehicle without risk to any wiring.

Ultimately, the plan is to stop using the Flex-A-Lite 31147 fan controller and operate them using the Sniper system.  This will give me an exact point of activating the fan and to control them separately if I choose.  This is far more accurate than the current solution of watching the gauge until I reach 180 and then turning the knob on the Flex-A-Lite controller until the fans turn on.

Additionally, before going on Power Tour in 2023, I installed a relay setup to provide full 12v power to the headlights when they are on and limiting dependence on routing power through the light switch itself.  However, that relay setup failed almost immediately.  I'd like to remove or at least reconsider how that works.  

With this work and my desire to just keep it clean looking with the additional Sniper wiring, I'll need to reconsider routing and wiring management a bit so that it is done to my satisfaction.  I really want to at least drive it some to confirm it works before pulling it further apart for that work.

The end product really isn't something to take a picture of and share with others.  However, I'm including it to document this point of the install process.  While the main things are wired, not everything is zip tied up in this picture and the wiring isn't plugged into the Sniper throttle body.


With the wiring completed to a testing state, I'm going to turn my attention to the fuel system.

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