[ZLRob]

Long story short, got a DW 440 fuel pump. Was supposed to come with the PWM capable controller. Came with the switching ground capable version controller, and their customer service requires you send emails back and forth with them because they can't be bothered to pick up the phone regarding any issues you have with their products. They provide great info over email (not taking that away from them at all), but 1/2 of the wait time and bullshit can be cut out by just picking up the phone and actually speaking with people. Novel idea I guess right?

Anyway, working with the current controller I have would require I delete out the signal wire from the FSCM to it and just provide it a solid ground. This would make it flow the full 440LPH it is capable of flowing at all times. My question is, would eliminating the signal wire out of the equation cause regulation issues? How would I be able to know what pressure the pump is currently supplying the high side?

[KingLT1]

Unless I am mistaken, I didn't think the ZL1 had a FSCM. Don't they have a CCM controller so all the fuel control is in the ECM?

I thought only the only 6th gen Camaro that had a FSCM was the 2016 SS cars with E92 and T87 controllers without the "A" prefix.

[ZLRob]

No the ZL1's have an FSCM which sends out a PWM variable voltage signal out to the fuel pump. CCM based Camaros run the module in the trunk and FSCM based Camaros run their FSCM on the differential. The ZL1 has its module mounted on the diff. This is also evident based on the fact that fuel pump tuning requires you change tabs over to the "fuel" tab on HPTuners indicating its a separate control module and not a virtual module integrated into the PCM.

[arpad_m]

Originally Posted by KingLT1

I thought only the only 6th gen Camaro that had a FSCM was the 2016 SS cars with E92 and T87 controllers without the "A" prefix.

Mine's a 2018 2SS with the T87A and it has an FSCM, too.

[2023_ZL1-AUTO]

My 2023 ZL1 with a T93 has an FSCM. At least this is what I thought I "intercepted" and spliced the hot wire on when I installed my original JMS Voltage Booster before Katech upgraded my fuel system. My process was just to splice the hot wire from the fuse to the module at the connector under the car and above the rear axle. I then ran the fuse's hot wire to the JMS device and then from the JMS device back to the other end of the hot I spliced. All my data still read correctly, such as pressure voltage, pressures etc. I know this is different than your describing. I'm just pointing out I had to connect to my ZL1's FSCM to complete the process.

[ZLRob]

Originally Posted by 2023_ZL1-AUTO

My 2023 ZL1 with a T93 has an FSCM. At least this is what I thought I "intercepted" and splice the hot wire on when I installed my original JMS Voltage Booster before Katech upgraded my fuel system. My process was just to splice the hot wire from the fuse to the module at the connector under the car and above the rear axle. I then ran the fuse's hot wire to the JMS device and then from the JMS device back to the other end of the hot I spliced. All my data still read correctly, such as pressure voltage, pressures etc. I know this is different than your describing. I'm just pointing out I had to connect to my ZL1's FSCM to complete the process.

Yep, so FSCM. I also had to go through this process when I did my JMS BaP so I'm absolutely sure of what I'm saying.

The question still stands, however, to anyone who is capable of giving me some sort of answer. Lol.

[ZLRob]

Per DW's email response it doesn't sound like a delete is possible. Maybe someone will interpret this differently than I am, however.

"your factory system has a pressure relief valve in the tank that opens to control the maximum pressure. If you over power it you can have a little less flow than your pump is capable of as the pump being on high will create more pressure in turn opening the valve. The goal is to ramp the fuel flow up as needed so the engine can draw it fast enough to turn the pump up without opening the PRV. That is why they are speed controlled. You can use PWM to have more control over it but you can also have a 2 speed controller that switches the pump to a higher flow rate as you are on throttle IE a hobbs switch or a ecu switched ground to achieve the same effect with less resolution while remaining effective. The setup is much easier for people who dont have experience setting these things up and that is why we sell the kit like that to those that are on factory ECUs."

[KingLT1]

2019 ZL1 and 2016 Z06 that I licensed were both CCM. Those are the only 2 that I had to license only to adjust exhaust valve settings. Nobody else's I have tuned has licensed that controller.

You can tell they are different than FSCM because if go to Fuel System, the fuel control module tab is missing on CCM cars.

[ZLRob]

Originally Posted by KingLT1

2019 ZL1 and 2016 Z06 that I licensed were both CCM. Those are the only 2 that I had to license only to adjust exhaust valve settings. Nobody else's I have tuned has licensed that controller.

You can tell they are different than FSCM because if go to Fuel System, the fuel control module tab is missing on CCM cars.

That's because I believe 2019 and up cars went virtual where the PCM controls it all.

[RobZL1]

Originally Posted by KingLT1

2019 ZL1 and 2016 Z06 that I licensed were both CCM. Those are the only 2 that I had to license only to adjust exhaust valve settings. Nobody else's I have tuned has licensed that controller.

You can tell they are different than FSCM because if go to Fuel System, the fuel control module tab is missing on CCM cars.

My '17 is a C304A CCM, for what it's worth, according to HPT.

[ZLRob]

According to Alldata (the holy grail of FSM's manufacturer wide) it is an FPCM. I also saw on there that VIN 7 Camaro's come equipped with a CCM which my VIN does not have.





I guess the thread is redundant at this point since deletion of the FPCM pulse width signal cannot be done reliably for my particular situation now.

[Megahurtz]

All modern combustion engine GM cars have a FPCM. What changed is that now the ECU holds the configs for the FPCM and controls it from there. You no longer have to flash the FPCM itself. That is why it isn't a recognized module in HPTuners on most 2014+ GM vehicles.

[KingLT1]

Originally Posted by Megahurtz

All modern combustion engine GM cars have a FPCM. What changed is that now the ECU holds the configs for the FPCM and controls it from there. You no longer have to flash the FPCM itself. That is why it isn't a recognized module in HPTuners on most 2014+ GM vehicles.

Agree. I was just saying (for clarification sake) that when using HPtuners to read the controllers all ZL1, Z06(that I have seen) show the FPCM being labeled as "CCM". The only model labeled "FSCM" is the 2016 SS. That was also the only year that "only" required 3 credits to license all 3 controllers. I only mention this because I wasn't sure if the info would help sort the OP's issue, but it appears to have caused more confusion than anything.

[Megahurtz]

Originally Posted by KingLT1

Agree. I was just saying (for clarification sake) that when using HPtuners to read the controllers all ZL1, Z06(that I have seen) show the FPCM being labeled as "CCM". The only model labeled "FSCM" is the 2016 SS. That was also the only year that "only" required 3 credits to license all 3 controllers. I only mention this because I wasn't sure if the info would help sort the OP's issue, but it appears to have caused more confusion than anything.

In ZL1's and Z06's the CCM only adds control of the active exhaust. The fuel pump settings are included in the ECU so you can edit the fuel pump settings with only licensing the ECU(which I assume is telling the FPCM what to do). There may be some odd ball years out there where this isn't the case, but at least for any 2017+ that is how it works now. Pretty sure all of the C7's/Z06's work this way too back to 2015. 2014 might be a weird year. I think maybe that's why I was confused here?