For 2025 we have updated, revised, and solidified our ZZP Ecotec boost reference fuel pressure system. Our new system keeps the same manifold referenced performance gains, while offering a more complete kit that looks great under hood. This kit is now a return style system with the regulator mounted under the hood on the fuel rail.
The ZZPerformance Ecotec Boost Reference Fuel Pressure System (BRFPS) easily installs into your Cobalt or Redline allowing fuel pressure adjustment above the PCMs range of adjustment. We prefer the "manifold regulated pressure" way of installing it, this lowers fuel pressure at idle to cure large injector idle issues and raises fuel pressure under boost to help fuel high HP applications. Highly recommended for LSJ's running over 17psi of boost or LE5's over 12psi. A boost reference system makes tuning easier and AFR more consistent at WOT.
Includes:
- ZZP Billet Fuel Rail
- ZZP AN return fuel line
- Fuelab adjustable regulator
- Fuel pressure gauge
- New OEM GM fuel filter
- ZZP AN fittings
- (5x) Fuel line mounts
- Fire wrap to insulate fuel line
- (4x) Injector clips
- All brackets, hardware, and instructions needed for installation
Manifold regulated fuel pressure:
For this installation method, the factory in canister regulator is bypassed. This requires dropping the tank and bypassing the factory 60psi regulator. When everything is installed set your fuel pressure to ~45psi at idle under full vacuum, and rise 1:1 under boost. This requires PCM reprogramming/tuning.
So how and why does this kit work? What is it actually doing?
The PCM doesn't compensate for boost over 17.5psi (12psi on LE5), so the car begins to go lean after that because the PCM file does not see more boost above the 17.5psi. This is unless you raise fuel pressure the same amount as boost, which is exactly what our BRFPS does. You can try and tune around the 17.5+psi but it's guess work and a very poor solution.
CLICK HERE for Digital Install Instructions
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