https://mhhauto.com/ Tue, 16 Jun 2026 06:44:43 +0000 MyBB https://mhhauto.com/Thread-2022-peterbilt-389 Sun, 14 Jun 2026 02:01:26 +0000 eagle745]]> https://mhhauto.com/Thread-2022-peterbilt-389 https://mhhauto.com/Thread-Help-needed-with-Flexihub-and-Davie4 Fri, 12 Jun 2026 17:59:41 +0000 Andres070708]]> https://mhhauto.com/Thread-Help-needed-with-Flexihub-and-Davie4 https://mhhauto.com/Thread-Ghg21-paccar-tuning Wed, 10 Jun 2026 04:54:15 +0000 NewCanadianTech]]> https://mhhauto.com/Thread-Ghg21-paccar-tuning https://mhhauto.com/Thread-Paccar-mx13-epa-13 Mon, 08 Jun 2026 22:53:48 +0000 mrperkins]]> https://mhhauto.com/Thread-Paccar-mx13-epa-13 Spn 1347 fmi 16
Spn 157 fmi 18
Only have Jpro
Im about to replace the relief valve
Any sugestions?]]> Spn 1347 fmi 16
Spn 157 fmi 18
Only have Jpro
Im about to replace the relief valve
Any sugestions?]]> https://mhhauto.com/Thread-Paccar-mx13-epa-13-tuning Mon, 01 Jun 2026 16:15:25 +0000 TFS2018]]> https://mhhauto.com/Thread-Paccar-mx13-epa-13-tuning https://mhhauto.com/Thread-Help-Needed-on-MTM-Type-Change Wed, 27 May 2026 01:15:46 +0000 Leonardo1999]]> https://mhhauto.com/Thread-Help-Needed-on-MTM-Type-Change Now it's showing a lot of faults, I got a bulletin that say it needs to be changed the MTM type
But i already have tried with service ranger, but it doesn't show the ADVANCED options
Maybe it should be done with Davie4, I don't know 

Anyone can help me remotely or have any idea?]]> Now it's showing a lot of faults, I got a bulletin that say it needs to be changed the MTM type
But i already have tried with service ranger, but it doesn't show the ADVANCED options
Maybe it should be done with Davie4, I don't know 

Anyone can help me remotely or have any idea?]]> https://mhhauto.com/Thread-Paccar-MX-13-DPF-regen-constantly-%E2%80%94-anyone-found-a-permanent-fix Sun, 24 May 2026 02:47:34 +0000 Graham_Hayes]]> https://mhhauto.com/Thread-Paccar-MX-13-DPF-regen-constantly-%E2%80%94-anyone-found-a-permanent-fix 2020 Kenworth T680, MX-13 under the hood. Truck's solid otherwise, but this DPF regen is killing me — kicks in every 200 miles, burns extra fuel, kills power, and it's just pointless.

Checked everything I could: exhaust, EGR, sensors — all clean, no change. Shop told me "just update the software," but after the last flash it actually got worse.

Anyone else dealt with this? Got a real fix that works, or is delete the only way out at this point? If so, point me to a tuner who knows Paccars and won't brick my ECU.]]> 2020 Kenworth T680, MX-13 under the hood. Truck's solid otherwise, but this DPF regen is killing me — kicks in every 200 miles, burns extra fuel, kills power, and it's just pointless.

Checked everything I could: exhaust, EGR, sensors — all clean, no change. Shop told me "just update the software," but after the last flash it actually got worse.

Anyone else dealt with this? Got a real fix that works, or is delete the only way out at this point? If so, point me to a tuner who knows Paccars and won't brick my ECU.]]> https://mhhauto.com/Thread-Peterbilt-389-Paccar-Epa21-swap-to-Caterpilar-C-15 Sat, 23 May 2026 12:18:08 +0000 Octavian]]> https://mhhauto.com/Thread-Peterbilt-389-Paccar-Epa21-swap-to-Caterpilar-C-15 Recently, on my Peterbilt 389, I swapped the PACCAR EPA21 engine for a Caterpillar C15 and installed a compatible automated transmission. The truck drives well, but it has an Bendix FLR(Forward Looking Radar) installed, and that’s causing a lot of problems.
Does anyone know if there’s a way to disconnect it, or make it work correctly with the Cat engine and the older-style transmission?
From what I understand, to disconnect the FLR, either the VECU or the radar/ABS ECU would need to be reprogrammed.
Does anybody have experience with this or know the legal way to disable the FLR? Any other suggestions for this situation would be appreciated.]]> Recently, on my Peterbilt 389, I swapped the PACCAR EPA21 engine for a Caterpillar C15 and installed a compatible automated transmission. The truck drives well, but it has an Bendix FLR(Forward Looking Radar) installed, and that’s causing a lot of problems.
Does anyone know if there’s a way to disconnect it, or make it work correctly with the Cat engine and the older-style transmission?
From what I understand, to disconnect the FLR, either the VECU or the radar/ABS ECU would need to be reprogrammed.
Does anybody have experience with this or know the legal way to disable the FLR? Any other suggestions for this situation would be appreciated.]]> https://mhhauto.com/Thread-2018-peterbilt-579 Fri, 22 May 2026 22:56:20 +0000 mrperkins]]> https://mhhauto.com/Thread-2018-peterbilt-579 I have a 2018 Peterbilt 579 with a MX 11 EPA 17. The aftertreatmen module does not connect (using JPro)
Connector has 12 volts and GND. Any ideas?

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One quick question if I test for ohms across yellow and green wires on tbe connector it should read 60 ohms right?]]> I have a 2018 Peterbilt 579 with a MX 11 EPA 17. The aftertreatmen module does not connect (using JPro)
Connector has 12 volts and GND. Any ideas?

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One quick question if I test for ohms across yellow and green wires on tbe connector it should read 60 ohms right?]]> https://mhhauto.com/Thread-Kess-3-Truck-cable-for-PACAR Wed, 20 May 2026 20:36:54 +0000 E key]]> https://mhhauto.com/Thread-Kess-3-Truck-cable-for-PACAR  I did order the cable but it do not fit the round 9 pines
any one using KESS reading this ecu can tell me which cable to use .]]>  I did order the cable but it do not fit the round 9 pines
any one using KESS reading this ecu can tell me which cable to use .]]> https://mhhauto.com/Thread-Paccar-ECM-flash-code Tue, 12 May 2026 18:28:40 +0000 RustyNova]]> https://mhhauto.com/Thread-Paccar-ECM-flash-code Anyone out there able to get a Paccar code for flashing a new ECM? I believe it’s a 4 digit.
Thanks in advance!]]> Anyone out there able to get a Paccar code for flashing a new ECM? I believe it’s a 4 digit.
Thanks in advance!]]> https://mhhauto.com/Thread-2025-Peterbilt-579-headlights-issue Mon, 11 May 2026 22:37:20 +0000 MaystorBG]]> https://mhhauto.com/Thread-2025-Peterbilt-579-headlights-issue
I'm experiencing some issues with the headlight wiring on 2025 Peterbilt 579 with an MX-13 Paccar engine.

Could someone share the wiring schematics for the high beam headlights?


Any help would be greatly appreciated!]]>
I'm experiencing some issues with the headlight wiring on 2025 Peterbilt 579 with an MX-13 Paccar engine.

Could someone share the wiring schematics for the high beam headlights?


Any help would be greatly appreciated!]]> https://mhhauto.com/Thread-DAVIE4-program-immobilizer-ignition-keys Sun, 26 Apr 2026 21:26:03 +0000 Gyula66]]> https://mhhauto.com/Thread-DAVIE4-program-immobilizer-ignition-keys https://mhhauto.com/Thread-Davie4-software Sun, 26 Apr 2026 16:29:31 +0000 Carlos21]]> https://mhhauto.com/Thread-Davie4-software https://mhhauto.com/Thread-Paccar-ESA--535578 Sat, 25 Apr 2026 13:58:10 +0000 Sonicblueterminator]]> https://mhhauto.com/Thread-Paccar-ESA--535578