Holley Pro Jection 4 Wiring Diagram

I don t have issues at all with them. 7 wiring harness assembly 1 534 25 1 8 fuel pump cable 1 9 manifold adapter 1 17 44 10 manifold. Designed to replace original holley components on the pro jection systems.

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About holley fuel injection.

Holley pro jection 4 wiring diagram. The stock fuel pump is trash too. 20 4 testing the oxygen sensor if equipped the pro jection d system oxygen sensor performance can be evaluated. Holley s hp ecu is standard equipment on the 2013 2016 chevrolet copo camaro and holley s efi throttle body powers every nascar sprint cup series team. 3 primary wiring harness assy 1 534 25 1 4 fuel filter metal 1 562 1 5 fuel filter plastic 1 562 3 6 fuel pump 1 12 927 7 gasket tbi flange 1 508 6 8 gasket universal manifold adapter 1 508 5.

The holley pro jection fuel injection system is designed to replace the two barrel carburetor on the 258 c i d. As of 2016 holley efi is also used to control every nhra pro stock car that goes down the strip. Holley wiring harness for 1 2 barrel pro jection systems. Holley carburetors powered every monster energy nascar cup team and nearly every nhra pro stock champion for four decades.

Congratulations on your purchase of holley s pro jection 2d stand alone fuel injection system. This manual contains information and diagrams related to wiring most holley efi products including ecu s ignition systems nitrous systems water methanol injection systems sensors and more. Holley 534 25 1 part number. These instructions must be read and fully understood before beginning installation.

Part type throttle position sensor 3 fuel filter 2 fuel injection wiring. If you can tune a carbed engine you can tune a pro jection. With the engine running open loop the meter reading should be near zero or one volt. Run a dedicated circuit for the ecu and do the relay wiring circuit mod for the fuel pump.

This system is designed for. Now holley efi products power these cars and are dominating the performance world. Probe the gray wire from the oxygen sensor connector with the positive lead of a digital voltmeter. Holley is quickly becoming the new standard in efi.

Holley has been the undisputed leader in fuel systems for over 100 years. This universal 300 cfm system can provide you with the benefits of modern fuel injection such as improved low end. Get an aeromotive pump. 3 1 1 important wiring do s and don ts.

Holley 534 25 1 holley wiring harness for 1 2 barrel. 504 13 pro jection 4d 650 cfm 504 12 pro jection 4d 700 cfm part number s 504 23 pro jection 4di 650 cfm 504 22 pro jection 4di 700 cfm 504 21 pro jection 4di 900 cfm installation tuning and troubleshooting manual note. For those that say pro jections are junk send them to me.