- Designed specifically for driving high-capacity, aftermarket in-tank Low Pressure Fuel Pumps (LPFPs), such as the Walbro F90000267 (450), without overheating the factory PWM fuel pump control module (FPCM) on MQB platform vehicles equipped with the FPCM Part No. 5Q0 906 093.
- PM3 is the first and only LPFP upgrade system on the market that allows the ECU to perform complete closed-loop control of the requested fuel system pressure regardless of what aftermarket pump is installed. The ability to use any aftermarket LPFP, while keeping the ECU in complete control of its operation, is a key distinguishing feature not available with any other competing solution.
- Supports, big turbo setups by removing the traditional LPFP fueling bottleneck and permitting the fuel system to hold any ECU-requested pressure.
- A truly scalable solution. A single PM3 can supply up to 36A of output current to the LPFP or multiple PM3s can be installed in parallel to drive banks of high-capacity pumps (e.g. in setups using external surge tanks). Regardless of the preferred fuel system configuration, the ECU tuning stays in complete control of the low pressure fuel system’s operation.
- Works with any LPFP model that draws less than 36A at peak load and peak duty. With the PM3 you are not sacrificing future flexibility and limiting your options by using a fueling solution that only lets you use one particular LPFP make/model.
- Works with any ECU tuning package, or even without any ECU tuning at all. With a PM3 you are not sacrificing future flexibility and limiting your options by using a fueling solution that forces you to use only one vendor’s ECU tuning suite.
- Compatible with voltage boosting modules and new high-voltage pumps rated for up to 20V.
- Integrates seamlessly with the vehicle’s factory electrical system.
- Included Plug-n-Play harness transfers maximum power to the pumps using thick 10AWG (5.0mm^2) automotive TXL wires.
- Reliable, easy to install and operate.
- Overdesigned using the highest-quality automotive and industrial grade electronic components that far exceed the operating ratings and endurance of the vehicle’s OEM electronic modules.
- Designed, built and tested in Canada.
Torqbyte PM3 is an advanced fuel pump driver module designed to overcome the challenges of increased fueling in returnless fuel injection systems where the ECU and the factory fuel pump control module (FPCM) perform closed loop control of the fuel system line pressure. In the factory configuration, the stock FPCM is only able to drive the in-tank fuel pumps the vehicle was originally equipped with. The PM3 has been a reliable workhorse in numerous high-horsepower VAG applications since its introduction. This latest kit allows the owners of MQB platform vehicles to realize the same LPFP upgrade benefits that the owners of previous generations of PM3-equipped VW and Audi vehicles have enjoyed for years.
Higher capacity aftermarket in-tank fuel pumps often draw more current than the factory LPFP control module is able to supply.
Such aftermarket pumps can overload the factory FPCM and cause it to overheat. This overloading and overheating results in intermittent pump operation which causes a drop in fuel line pressure thus defeating the whole purpose behind running a upgraded fuel pumps. Torqbyte PM3 provides the best and most effective solution to this problem.
PM3 installs between the FPCM and the upgraded LPFP to relieve the factory system of the current supply role. PM3 is capable of continuously supplying the aftermarket LPFP with up to 36A of current.
While the PM3 does all the heavy lifting in terms of supplying the required current to the aftermarket LPFP, its electronics replicate the exact PWM control signal being generated by the FPCM. Torqbyte’s innovative technical solution implemented within the PM3 allows the ECU and FPCM to maintain full control of the aftermarket fuel system operation and maintain the closed-loop fuel pressure control mechanism the vehicle was originally designed with. This key distinguishing feature is something that _none_ of the other fuel control “upgrades” currently on the market are able to offer.
The supplied Plug-n-Play harness is designed to eliminate cutting, splicing or disturbing the factory electrical wiring. It inserts in-line with the factory FPCM connector located on top of the fuel tank.
The Plug-n-Play adapter uses OEM VAG connectors with proper silicone wire seals and properly-crimped contact terminals. All wire is SAE J1127 TXL automotive wire.
Fuel Sender Connection
In order to minimize line losses and ensure maximum electrical power transfer to the fuel pump, the Torqbyte kit comes with a custom pump power wiring adapter with SAE J1127 10AWG (5.0mm^2) TXL automotive wire.
About the PM3
PM3 is easy to install and comes equipped with a built-in 40A fuse.
On the outside, Torqbyte PM3 is enclosed in a thermally-conductive, CNC machined aluminum enclosure that is hard anodized for maximum durability.
On the inside, Torqbyte PM3’s electronics showcase our top two design goals: Quality and Reliability. PM3’s design relies entirely on industrial-grade electronic components from the world’s leading semiconductor companies including Texas Instruments, Analog Devices, Infineon Technologies, STMicroelectronics, ON Semiconductor and Vishay Intertechnology.
Torqbyte PM3 is supplied with SAE J1127 10AWG TXL automotive wire with annealed stranded copper conductors and premium-grade abrasion, chemical and moisture resistant, high temperature Crosslinked Polyethylene insulation.
Note: The installation procedure shown below is only intended to show one possible installation approach and to highlight some of the key steps and pieces of hardware included on the kit. Other approaches are also possible and would be just as suitable. The vehicle used for this procedure was a 2015 Audi S3.
1. Disconnect the battery before doing any electrical work on the vehicle. Remove the rear seat to access the fuel sender cover.
2. Remove the grommet.
3. Push the rubber grommet through the cover and flip the cover over to access the fuel sender connections.
4. Release the Fuel Pump Control Module (FPCM) from its holder. This can be frustrating, but there is a single tank at the top that has to be pushed up and this will release the module. Pull the module out and disconnect it from the wiring harness. Clean the module and set it aside. It will be relocated inside the vehicle later on.
5. Pull the remaining connectors through the cover to free the cover.
6. Drill a 12mm hole (15/32″) in the cover. We recommend the location shown below. Some people prefer not to drill the cover, but to pass the required wiring through a small incision in the large rubber grommet. If going with the rubber grommet option, the incision should be made in the flat part of the grommet and extreme care should be taken not to damage the factory wiring that already passes through the grommet.
7. Assuming the aftermarket LPFP is already properly installed in the fuel sender basket, attach the supplied 10AWG pump power wire adapter. Ensure the connector lock is properly engaged.
8. Pass the square black 4-Pin connector with three thin wires (Red, Black and Blue) through the cover so that the small connector goes towards the interior of the vehicle. If drilling a hole, try to do a nicer job than our techs did in the photo below.
9. Pass the unterminated ends of the 10AWG pump power wire adapter through the same hole (or through the inscision in the grommet if you opted for that approach) so they also go towards the interior of the vehicle.
10. Roughly place the large 5-Pin male D-connector in position as shown. This connector will mate with the large 5-Pin female D-connector that used to be attached to the (now removed) fuel pump control module.
11. Bring all the factory connectors back through the cover.
12. Mate the new large 5-Pin male D-connector with the factory large 5-Pin female D-connector as shown. Ensure the connector lock is properly engaged.
13. The factory 2-Pin fuel pump power wire D-connector is no longer needed. Mate it with the supplied blind plug that will protect it from the elements. Ensure the connector lock is properly engaged.
14. Reconnect the fuel level D-connector. Ensure the connector lock is properly engaged.
15. Cleanly tuck everything under the cover. Ensure nothing is loose or rubbing against a sharp metal edge. Snap the cover back into place and try not to crack it the way our techs did. Run the new wiring neatly alongside the existing wiring. You can tie the new wiring to the existing wiring using harness lacing or you can use protective wire loom. Seal the hole previously made in the cover if you used this approach instead of the grommet incision.
16. Neatly run the wiring under the plastic panels and under carpeting under the backrest of the rear seat until it exits in the trunk area. Ensure the wires are routed such that the folding action of the rear seat will not crush the wires or pull on them if the seat is ever folded down in the future.
17. Locate the short 4 to 12 pin adapter and the included P3073x module.
18. Mate the adapter with the P3073x module and ensure the connector locking tab is properly engaged.
19. Locate the supplied 3-way adapter shown below.
20. Mate the 10-Pin connector on the 3-way adapter to the other end of the P3073x module and ensure the connector locking tab is properly engaged.
21. Mate the large 5-Pin D-connector to the removed fuel pump control module.
22. Locate the supplied machined aluminum holder bracket and attach to it the two supplied 3M VHB tape pads.
23. Mate the remaining 2-Pin connector on the 3-way adapter to the PM3’s Control In connector and ensure the connector locing tab is properly engaged. Make sure you add strain relief to the wires on the 3-way adapter by looping them as shown below BEFORE fastening all the components to the metal bracket. Using the four supplied screws attach the PM3 to the bracket as shown, so its Control In connector is pointing in the same direction as the top of the fuel pump control module. Peel off the VHB tape cover and firmly press the fuel pump control module and the P3073x module into place as shown. You should now have a one-piece assembly that you can mount in the trunk area.
24. When selecting the mounting location, ensure it’s out of the way and high up enough that items sliding around in the trunk will not impact and cause damage to the modules, especially the orange fuse that protrudes from the PM3. In this example we opted for installing everything at the top of a vertical carpeted panel on the passenger-side of the vehicle almost near the top of the trunk.
25. Mate the two 4-Pin connectors together as shown and ensure the connector locking tab is properly engaged.
26. Using the two supplied yellow wire splices connect the PM3’s Pump Out connector adapter to the two 10AWG pump power wires. Red to Red and Black to Black. Carefully read over the Power and Grounding notes HERE and find a suitable vehicle grounding point preferably near the trunk area. Terminate the ground (BLACK / Negative) wire on the PM3’s power connector to this ground using the supplied M6 or M8 ring lug. PM3’s (RED / Positive) Power wire should be extended right to the fuse box in the engine bay.
27. Use the supplied 40A fuse and fuseholder with an M5 lug right at the fuse box power entry. Use the supplied 10AWG yellow sealed splice to extend the wiring to the PM3.
29. Check everything over 3 times and ensure all the sealed splices have been heatshrunk before reconnecting the battery.