Holley Pro Jection 4 Wiring Diagram

Part type throttle position sensor 3 fuel filter 2 fuel injection wiring. 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. These instructions must be read and fully understood before beginning installation.

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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.

Holley pro jection 4 wiring diagram. For those that say pro jections are junk send them to me. Probe the gray wire from the oxygen sensor connector with the positive lead of a digital voltmeter. Congratulations on your purchase of holley s pro jection 2d stand alone fuel injection system. 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.

Holley 534 25 1 holley wiring harness for 1 2 barrel. 7 wiring harness assembly 1 534 25 1 8 fuel pump cable 1 9 manifold adapter 1 17 44 10 manifold. With the engine running open loop the meter reading should be near zero or one volt. Holley 534 25 1 part number.

Holley carburetors powered every monster energy nascar cup team and nearly every nhra pro stock champion for four decades. 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 has been the undisputed leader in fuel systems for over 100 years. Get an aeromotive pump.

About holley fuel injection. 3 1 1 important wiring do s and don ts. Holley wiring harness for 1 2 barrel pro jection systems. The stock fuel pump is trash too.

As of 2016 holley efi is also used to control every nhra pro stock car that goes down the strip. This universal 300 cfm system can provide you with the benefits of modern fuel injection such as improved low end. Holley is quickly becoming the new standard in efi. I don t have issues at all with them.

Now holley efi products power these cars and are dominating the performance world. Designed to replace original holley components on the pro jection systems. Run a dedicated circuit for the ecu and do the relay wiring circuit mod for the fuel pump. This system is designed for.

If you can tune a carbed engine you can tune a pro jection. The holley pro jection fuel injection system is designed to replace the two barrel carburetor on the 258 c i d. 20 4 testing the oxygen sensor if equipped the pro jection d system oxygen sensor performance can be evaluated.