MegaSquirt USB to Serial Adapter by MegaSquirt Plug-N-Play Engine Management

MegaSquirt USB to Serial Adapter
MegaSquirt USB to Serial Adapter
MegaSquirt USB to Serial Adapter
MegaSquirt USB to Serial Adapter
MegaSquirt USB to Serial Adapter
MegaSquirt USB to Serial Adapter

Connect your tuning laptop or PC to your MegaSquirt ECU with this USB to serial adapter from DIYautotune!

Item #USB-RS232

Sale Price: $31.34

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  • Works With All Versions of TunerStudio
  • Connects Laptop Without DB9 Serial to USB
  • Full Technical Support From DIYAutotune


  • Threaded Lock Screws
  • USB 2.0 Compatible
  • FTDI USB to RS232 Converter Chipset
  • Short Cable Eliminates Electrical Noise

 What's in the Box

  • (1) USB to DB9 Serial Adapter
  • (1) USB Extension Cable

USB to Serial Adapter For MegaSquirt PNP Gen 2
Ensure you have a proper connection to your laptop while tuning your 86-95 Mustang with a MegaSquirt PNP Gen 2 with USB to serial adapter! DIYAutotune highly recommends this adapter to be used if your tuning PC/laptop doesn’t have a DB9 Serial connector. No CD is required with this adapter; simply download the drivers linked below, and you'll be tuning in no time! The adapter USB connection is on one side, and a DB9 serial connector is on the other. A short USB extension cable is included so you do not have the heavy adapter plug hanging out of the side of your computer or laptop for a more solid connection. 

Product Note
For the latest drivers and support, visit MegaSquirt.

Megasquirt Warranty

California Residents:
Prop 65 Warning SignWARNING: Cancer and Reproductive Harm-

About This Brand

MegaSquirt Plug-N-Play Engine Management
When your time is money (or you just don’t have time to spare), it’s worth paying a bit extra to make the installation go as smoothly as possible. You don’t want to go through a list of options and specify what you want on the ECU like you were ordering a pizza, and you definitely don’t want to solder one together from a kit. You want something you can just take out of the box and have it work. This might take the form of a universal ECU that’s got all the inputs and outputs it needs to run a wide variety of applications when you wire it up, or it could be a plug and play system that plugs right in place of the existing ECU and is ready for you to start tuning. Unplug your stock ECU, plug in the MSPNP, run a vacuum line to it, and fire your engine up on the first turn of the key if it’s at all similar to stock. If you’re running bigger injectors there’s one setting to change and then you’re ready to fire your engine as well. It really is that easy. The MSPNP is a true plug-n-play ECU that we offer for an ever-increasing line of factory fuel-injected cars. It includes every feature you need to have full control over your fuel and ignition, plus features like electronic boost control, launch control, table switching, adjustable rev limiters, and other things normally not found in a stock ECU or even a hacked/re-tuned OEM ECU. Check out all of the Megasquirt ECU kits available here at!
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