Aeromotive 66138 BoostWorx Auto-On Dual Fuel Pump PWM Controller Universal

Vehicle Fitment

• Universal - not vehicle-specific. Designed for stand-alone ECU applications running dual Aeromotive 340 LPH in-tank fuel pumps (not OEM fuel pump modules)

Fitment Notes

• Requires a stand-alone ECU/ECM setup capable of closed-loop PWM pump control; not designed to integrate with a factory OEM fuel module
• Aftermarket pump hangers may need additional bypass fuel provisions (e.g., an added jet on the pump hat) since the single transfer-pump hole used on OEM modules isn't present on naked dual-pump setups

Features

• Stand-alone, OE-type returnless fuel control system for dual-pump applications
• 1:1 manifold-referenced fuel pressure control via included stand-alone MAP sensor
• Auto-On second pump activation at 4 psi of boost - no relays or Hobbs switches needed
• Up to 2/3 reduction in power to the fuel pumps during idle and cruise vs. traditional systems
• Compatible with Aeromotive's line of 340 LPH in-tank fuel pumps
• Over-temperature shutdown with automatic reset
• Short-circuit protection with automatic reset
• OEM Delphi/Aptiv-style connectors and cross-linked polyethylene wiring throughout

Specifications

• Operating Voltage: 10-22V (compatible with voltage boosters)
• Continuous Power Rating: 80A minimum
• Controller Size: 4.5 in L x 3.5 in W x 2 in H
• Base Fuel Pressure: typically 42 psi at idle (wider range available)
• Second Pump Turn-On Threshold: 4 psi of boost
• Compatible Pumps: Aeromotive 340 LPH in-tank fuel pumps

Included Components

• 1x BoostWorx Auto-On Dual Fuel Pump PWM Controller
• 1x Billet Aluminum MAP Sensor Bracket and 3-Bar Pressure Sensor
• Wiring Harness with OEM-style Sealed Connectors

Product Description

The Aeromotive 66138 is a stand-alone PWM controller purpose-built for dual-pump fuel systems running on a stand-alone ECU, rather than an OEM fuel module. It provides 1:1 manifold-referenced fuel pressure control through an included MAP sensor, functioning much like a traditional mechanical fuel pressure regulator, while electronically managing pump speed to reduce heat and extend pump life during idle and cruise.

Its Auto-On feature automatically brings a second pump online once boost reaches 4 psi, eliminating the need for a separate Hobbs switch or relay-based staging setup. Because it's designed around Aeromotive's 340 LPH in-tank pumps specifically - not OEM fuel modules - builders using aftermarket pump hangers will need to account for adequate bypass fuel flow to keep the pumps operating correctly in closed-loop mode.

This controller suits high-horsepower, dual-pump builds on a stand-alone ECU where a factory-style fuel module isn't part of the setup - commonly seen in swap and race applications running Aeromotive's 340 LPH pumps in a twin configuration.