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Stand-Alone Returnless Fuel Module Controller Built Around the Cadillac CTS-V2 Fuel System
The Aeromotive 66141 VaporWorx Gen 2 CTS-V returnless PWM controller is engineered to replace or augment the OEM fuel system control module on the 2009-2015 Cadillac CTS-V and deliver stand-alone, OE-type returnless fuel control for stock to heavily modified LSA applications. The Aeromotive 66141 integrates directly with the GM CTS-V2 fuel pump module and supports OEM, DW300C, AEM, or other CTS-V2 direct-fit pumps, providing constant or manifold-referenced fuel pressure via a 1:1 boost-referenced MAP sensor when boost-following pressure control is desired. At idle and cruise, the 66141 reduces power to the fuel module by up to two-thirds compared to traditional return-type systems, significantly lowering pump heat and electrical demand during street driving while maintaining full output under boost or wide-open throttle.
Key Features
- Aeromotive 66141 stand-alone returnless PWM controller for CTS-V2 fuel pump modules
- Compatible with OEM, DW300C, AEM, and other CTS-V2 direct-fit fuel pumps
- Supports constant or manifold-referenced (boost-following) fuel pressure modes
- Includes standalone MAP sensor for manifold-referenced pressure control on supercharged LSA applications
- 40A minimum continuous power rating in a compact 4.5 x 3.5 x 2 inch package
- Integrates with OEM ECM to keep all safety systems functional
- Over-temperature shutdown with automatic reset, short circuit protection
- 10-22V operating range, compatible with voltage boosters including JMS FuelMax
- Up to 2/3 reduction in fuel module power draw at idle and cruise vs. return-type systems
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2009-2015 | Cadillac | CTS-V | Sedan LSA |
| 2009-2015 | Cadillac | CTS-V | Coupe LSA |
| 2009-2015 | Cadillac | CTS-V | Wagon LSA |
Specifications
| Detail | Value |
|---|---|
| Part Number (MPN) | 66141 |
| Brand | Aeromotive |
| Product Line | VaporWorx (Legacy: PWCTSV3B, PWDW300C3B) |
| System Type | Returnless PWM Controller |
| Fitment | 2009-2015 Cadillac CTS-V (CTS-V2 LSA) |
| Power Rating | 40A continuous minimum |
| Controller Dimensions | 4.5 x 3.5 x 2 inches |
| Operating Voltage | 10-22V |
| Max Fuel Pressure (OEM Module) | 65 PSI (OEM internal safety valve limit) |
| Compatible Pumps | OEM, DW300C, AEM, other CTS-V2 direct-fit |
| Prop 65 | Yes |
| UPC | N/A |
What's Included
- 1 Aeromotive 66141 returnless PWM controller
- Standalone MAP sensor for manifold-referenced pressure control
- OEM Delphi/Aptiv connectors and wiring harness
- Mounting hardware and installation instructions
About Aeromotive
Aeromotive has been at the forefront of high-performance fuel system engineering since 1994. Based in Lenexa, Kansas, Aeromotive designs and manufactures fuel pumps, regulators, filters, fittings, and complete fuel system solutions for street performance, drag racing, road racing, and extreme high-power builds. The VaporWorx line represents Aeromotive's demand-matched PWM fuel control technology, and the 66141 is specifically tailored to the unique architecture of the CTS-V2 LSA fuel system.
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Frequently Asked Questions
What is the Aeromotive 66141?The Aeromotive 66141 is the VaporWorx Gen 2 CTS-V returnless PWM fuel module controller designed for 2009-2015 Cadillac CTS-V LSA applications. Part number 66141 replaces the role of the OEM fuel system control module and provides stand-alone, demand-matched returnless fuel pressure control, supporting constant or boost-referenced manifold-referenced pressure modes with a 40A continuous power rating.
Which CTS-V years does the Aeromotive 66141 fit?The 66141 is specifically designed for the 2009-2015 Cadillac CTS-V Gen 2 (CTS-V2) with the LSA supercharged V8 engine. It is compatible with the OEM CTS-V2 fuel pump module and CTS-V2 direct-fit aftermarket pumps including the DW300C and AEM units. It is not designed for the 2004-2007 Gen 1 CTS-V or the 2016 and newer Gen 3 CTS-V.
Can the 66141 work with upgraded fuel pumps like a DW300C?Yes. The Aeromotive 66141 is explicitly listed as compatible with the DW300C, OEM, AEM, and other CTS-V2 direct-fit fuel pump modules. This makes it an ideal controller for builds that have already upgraded the OEM pump to a higher-flow option to support LSA power upgrades, positive displacement blower swaps, or injector upgrades requiring higher fuel pressure capability.
What does manifold-referenced fuel pressure mean on the 66141?Manifold-referenced fuel pressure means the fuel system raises fuel pressure in proportion to boost pressure, maintaining a constant pressure differential across the fuel injectors. On a boosted engine like the CTS-V LSA, this allows injector duty cycles to be reduced at idle and cruise while preserving the same effective fuel delivery at full boost. The 66141 achieves this by connecting the included MAP sensor to the intake manifold and using it as the pressure control reference signal.
Does the Aeromotive 66141 require ECM retune?If switching from a return-type setup to returnless with manifold-referenced pressure control, an ECM recalibration is typically recommended to properly set injector duty cycle tables for the new fuel pressure curve. For constant fuel pressure mode without manifold reference, a car already calibrated for constant pressure on a return system may not require a full retune. Consult your tuner before making fuel system changes on an LSA CTS-V build.
What is the maximum fuel pressure the 66141 can deliver with the OEM module?Aeromotive specifies a maximum of 65 PSI when using the OEM internal safety valve within the CTS-V2 fuel module. Above this pressure, the OEM valve will begin to open, preventing further pressure increase. For applications requiring fuel pressure above 65 PSI, an aftermarket fuel module without the OEM internal safety valve may be required.
Is the Aeromotive 66141 compatible with voltage boosters?Yes. The 66141 has a 10-22V operating range and is compatible with voltage boosters. Aeromotive specifically recommends the JMS FuelMax voltage booster for applications requiring additional pump output. Note that applying less than 10V to the controller's turn-on circuit will trigger a shutdown to protect against lean AFR conditions.
Does the 66141 keep OEM safety systems functional?Yes. The 66141 is designed to integrate with the OEM ECM and preserve all OEM safety functions. The documentation notes that disconnecting the OEM FSCM and routing its trigger/turn-on wire from the ECM to the VaporWorx controller turn-on circuit is a reliable integration method that has been validated in CTS-V2 applications.
Installation Instructions
- Confirm the vehicle is a 2009-2015 Cadillac CTS-V with CTS-V2 LSA fuel pump module.
- Disconnect OEM FSCM and route its trigger/turn-on wire to the Aeromotive 66141 turn-on circuit.
- Connect the 66141 wiring harness to the CTS-V2 fuel pump module using the included OEM Delphi/Aptiv connectors.
- For manifold-referenced pressure: install the included MAP sensor in the intake manifold and connect its signal wire to the 66141.
- For constant pressure: leave the MAP sensor disconnected and set base fuel pressure at 42-60 PSI.
- Wire main power feed to the 66141 with a minimum 40A continuous rated circuit.
- Ground the controller to a dedicated chassis ground point.
- Power up, verify fuel pressure at idle, and confirm pump operation before returning vehicle to service.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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