Dual and triple pump wiring shown in the following diagram:
Returnless Pulse Width Modulation Controller, Dual Fuel Pump Applications
Returnless Pulse Width Modulation Controller, Dual Fuel Pump Applications
Product Info
Product Info
Aeromotive Part Number: 66138
Legacy VaporWorx Part Number: PWDP3B
The Auto-On dual fuel pump control system has everything needed to provide a stand-alone, OE-type returnless fuel system.
This system is to be used with dual fuel pumps (not OEM fuel pump modules) to provide a 1:1 manifold referenced fuel pressure using the VaporWorx supplied stand-alone MAP sensor and mounting bracket. It will act just like a mechanical fuel pressure regulator would with the ECM tuned in the same manner. The fuel injector does not know if the fuel supplied is pumped by a return or returnless system.
The standard kit is calibrated for 1:1 fuel pressure change vs. manifold pressure, the same as a traditional mechanical fuel pressure regulator.
Base fuel pressures at idle are typically 42psi, but the VaporWorx controller has much greater range if needed.
The Auto-On Pump control system monitors the MAP sensor to provide a MAP referenced fuel pressure and to turn on the second pump. The VaporWorx controller has a Pump 2 output that turns on at 4psi of boost. No Hobb's switches, relays, or other devices are needed.
For pumps to operate in closed loop PWM mode, some fuel must pass through the pumps while running. This fuel volume is more than what the engine needs at idle and cruise. So, additional bypass fuel must be added. In the OEM fuel module this fuel is put to work driving the multiple transfer pumps that move fuel into the module reservoir. On aftermarket pump hangers the single hole used to drive the transfer pump needs to be increased or provided by some other method. For Rick's Tanks pump hats, there is a jet that can be installed to perform this bypass.
The fuel pumps supported by this PWM Controller is Aeromotive's line of 340 LPH In-Tank Fuel Pumps.
The 3bar Auto-On Fuel Module Controller system includes these standard features:
- Everything needed electrically to drive the fuel pump module. No relays or Hobb's switches needed.
- Up to 2/3 reduction in power to the fuel module during idle and cruise vs traditional systems.
- 80A minimum continuous power rating in a compact controller package. Total size 4.5" L x 3.5" W x 2" H.
- Over-temperature shutdown with automatic reset that will operate indefinitely without damage.
- Short circuit protection with automatic reset that will operate indefinitely without damage.
- OEM Delphi/Aptiv connections for terminals, seals, and connector bodies where appropriate.
- All cross-linked polyethylene wiring.
- UL94 rated components used throughout.
- Integrates into the OE ECM to allow all safety systems to remain functional.
- 10-22v operating capacity. Can be used with voltage boosters. The preferred booster is the JMS FuelMax.
- Lower than 10v applied to the turn on circuit will cause controller shutdown to protect from an AFR lean condition.
- Must be used in manifold referenced fuel pressure mode.
- Second pump turn-on set to 4psi boost.
NOTE: Returnless systems require a safety overpressure valve. Please see here for details: 80 psi / 5.5bar Safety Overpressure Regulator
Installation Instructions
Installation Instructions
Product warranty
Product warranty
Limited Warranty for Aeromotive Products for the United States of America
Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.
| Products | Warranty Duration |
|
2 years |
|
1 year |
Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.
This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.
Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.
Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.
There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.
If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.
This warranty supersedes any warranties stated in product manuals or other written materials.
Effective Date: March 16, 2026
Returns & replacements
Returns & replacements
Returns:
- Accepted within 90 days of purchase.
- Prior authorization required; items must be new and resaleable.
- Call 913-808-2376 to initiate a return and get an RGA.
- Ship unused products in original packaging with proof of purchase.
- You pay return shipping; use a trackable method.
- Refund excludes initial shipping fees and may include up to a 15% restocking fee.
- Refunds processed within 5-10 days of return acceptance.
Limits of Responsibility:
- See Product Warranty page for more info.
Reviews
Reviews
Returnless Pulse Width Modulation Controller, Dual Fuel Pump Applications
Returnless Pulse Width Modulation Controller, Dual Fuel Pump Applications
Regular price
$707.16
Sale price
$707.16
Regular price
Unit price
per
Does This part fit My vehicle?
Emissions Code
Continue Reading to Understand Emissions Codes
View full details
Product Info
Product Info
Aeromotive Part Number: 66138
Legacy VaporWorx Part Number: PWDP3B
The Auto-On dual fuel pump control system has everything needed to provide a stand-alone, OE-type returnless fuel system.
This system is to be used with dual fuel pumps (not OEM fuel pump modules) to provide a 1:1 manifold referenced fuel pressure using the VaporWorx supplied stand-alone MAP sensor and mounting bracket. It will act just like a mechanical fuel pressure regulator would with the ECM tuned in the same manner. The fuel injector does not know if the fuel supplied is pumped by a return or returnless system.
The standard kit is calibrated for 1:1 fuel pressure change vs. manifold pressure, the same as a traditional mechanical fuel pressure regulator.
Base fuel pressures at idle are typically 42psi, but the VaporWorx controller has much greater range if needed.
The Auto-On Pump control system monitors the MAP sensor to provide a MAP referenced fuel pressure and to turn on the second pump. The VaporWorx controller has a Pump 2 output that turns on at 4psi of boost. No Hobb's switches, relays, or other devices are needed.
For pumps to operate in closed loop PWM mode, some fuel must pass through the pumps while running. This fuel volume is more than what the engine needs at idle and cruise. So, additional bypass fuel must be added. In the OEM fuel module this fuel is put to work driving the multiple transfer pumps that move fuel into the module reservoir. On aftermarket pump hangers the single hole used to drive the transfer pump needs to be increased or provided by some other method. For Rick's Tanks pump hats, there is a jet that can be installed to perform this bypass.
The fuel pumps supported by this PWM Controller is Aeromotive's line of 340 LPH In-Tank Fuel Pumps.
The 3bar Auto-On Fuel Module Controller system includes these standard features:
- Everything needed electrically to drive the fuel pump module. No relays or Hobb's switches needed.
- Up to 2/3 reduction in power to the fuel module during idle and cruise vs traditional systems.
- 80A minimum continuous power rating in a compact controller package. Total size 4.5" L x 3.5" W x 2" H.
- Over-temperature shutdown with automatic reset that will operate indefinitely without damage.
- Short circuit protection with automatic reset that will operate indefinitely without damage.
- OEM Delphi/Aptiv connections for terminals, seals, and connector bodies where appropriate.
- All cross-linked polyethylene wiring.
- UL94 rated components used throughout.
- Integrates into the OE ECM to allow all safety systems to remain functional.
- 10-22v operating capacity. Can be used with voltage boosters. The preferred booster is the JMS FuelMax.
- Lower than 10v applied to the turn on circuit will cause controller shutdown to protect from an AFR lean condition.
- Must be used in manifold referenced fuel pressure mode.
- Second pump turn-on set to 4psi boost.
NOTE: Returnless systems require a safety overpressure valve. Please see here for details: 80 psi / 5.5bar Safety Overpressure Regulator
Dual and triple pump wiring shown in the following diagram:
Installation Instructions
Installation Instructions
Product warranty
Product warranty
Limited Warranty for Aeromotive Products for the United States of America
Aeromotive, LLC warrant to the original end user purchaser in the United States that the Aeromotive and Waterman Racing Components branded products (“Product(s)”) shall be free from defects in material and workmanship for the warranty durations set forth in the chart below from the date of purchase or delivery, whichever is later.
| Products | Warranty Duration |
|
2 years |
|
1 year |
Because Aeromotive, LLC (collectively, the “Company”) cannot control the quality of products sold by unauthorized sellers, this warranty applies only to Products that were purchased from the Company or the Company’s authorized sellers in the United States, unless otherwise prohibited by law. Company reserves the right to reject warranty claims for Products purchased from unauthorized sellers, including unauthorized Internet sites.
This warranty does not cover any defects due to normal wear and tear, damage due to misuse, alteration to the product, negligence, damage caused by aftermarket applied coatings, discoloration, or corrosion of finished surfaces. This warranty also does not cover damage resulting from collision, improper installation, off-road use, road hazards, the use of exhaust insulating wrap or like products, or rust occurring after installation.
Purchasers of a Product who wish to make a warranty claim based upon an alleged Product defect should email the Company at techs@aeromotiveinc.com the following information: (1) Product subject to the claim, (2) brief description of the alleged defect, (3) date and place of purchase/delivery, (4) proof of purchase (showing when and where the Product was purchased), and (5) pictures or videos of the Product. If you purchased on an online marketplace, please be sure the proof of purchase shows from whom you purchased (this information is available in your order history). In some instances, Company may instruct you to mail the Product to Company for inspection and/or repair; if such instruction is provided, Company will provide you with a prepaid shipping label. You can also contact the Company Monday – Friday, 8AM – 6:30PM CT at (913) 808-2376.
Company will replace or repair a defective Product that is covered by this warranty. This
warranty does not cover the cost of removal or installation. Company will pay for the return shipping of the Product to the purchaser.
There are no warranties which extend beyond those stated herein. ANY IMPLIED
WARRANTIES THAT MAY BE APPLICABLE TO PRODUCTS, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE DURATION OF THIS WARRANTY. Some States do not
allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
UNDER NO CIRCUMSTANCES SHALL THE COMPANY BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES BASED UPON BREACH OF THIS LIMITED
WARRANTY, BREACH OF CONTRACT OR STRICT LIABILITY. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.
If you have any questions about whether a seller is authorized, please contact us at (913) 808-2376.
This warranty supersedes any warranties stated in product manuals or other written materials.
Effective Date: March 16, 2026
Returns & replacements
Returns & replacements
Returns:
- Accepted within 90 days of purchase.
- Prior authorization required; items must be new and resaleable.
- Call 913-808-2376 to initiate a return and get an RGA.
- Ship unused products in original packaging with proof of purchase.
- You pay return shipping; use a trackable method.
- Refund excludes initial shipping fees and may include up to a 15% restocking fee.
- Refunds processed within 5-10 days of return acceptance.
Limits of Responsibility:
- See Product Warranty page for more info.
Reviews
Reviews
EMISSIONS PLACARD
Aeromotive use a voluntary product identification program whereby all emission sensitive products can be identified by placing numbered labels in product packaging and listing corresponding numeric codes next to each part number. The corresponding numbers and explanations are as follows:
AEROMOTIVE EMISSIONS CODES
This product has been granted a California Air Resources Board (CARB) Executive Order (EO Number) Exemption. It is 50 State Legal when installed on the Specified vehicle per the Manufacturer’s Current Application Guide, the CARB EO, and Installation Instructions.
AEROMOTIVE EMISSIONS CODES
This product is Legal for use on Pre-PoIIution Controlled Vehicles. It is legal for use on all vehicles produced Before Emissions Control Regulations were imposed. These are considered Uncontrolled Vehicles and are defined as follows
- 1965 and Older US Manufactured California Certified Vehicles
- 1967 and Older US Manufactured Federally Certified Vehicles
- 1967 and Older Foreign Manufactured Vehicles
AEROMOTIVE EMISSIONS CODES
This Product is LEGAL for Closed Course Competition use or Pre-Emissions Controlled Vehicles ONLY. It is Not Legal for use on any Emissions Controlled Vehicle for Street or Off Highway use.
AEROMOTIVE EMISSIONS CODES
This Product is considered а Replacement Part per CARB and EPA regulations for emissions compliance and is legal for sale and use on specified vehicles in all 50 states as stated in Manufactured's Application Guide and lnstallation Instructions.
AEROMOTIVE EMISSIONS CODES
This Product is legal for Street or Off Highway use in 49 States. This product meets the EPA Anti Tampering Policy for Reasonable Basis that allows the stated vehicle to operate within the legal emissions standards in states that do not require а California EO. This product in Not Legal for Street or Off Highway use in California.
AEROMOTIVE EMISSIONS CODES
This Product is Certified by the Manufacturer as being а Non-Emissions Related part per CARB and EPA regulations and therefore does not require emissions certification or CARB EO and is legal in all 50 states.
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