While USB does present potential problems, it is commonly used to connect to cars without problems and is usually the most practical solution. Lift it out progressively by prying up each end a fraction at a time. I can supply, repair or upgrade Megasquirts in UK. If you do not then there is a serial problem somewhere. In fact, you may find using an adapter more difficult if your computer has a standard serial port.

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How does that relate to the EM noise in a car, well just think how much less EM noise it takes to cause a mV difference for corruption or a disruption to your data over USB compared to the good old serial where it takes a V difference! If you do experience problems during loading firmware, there are additional tests to try.

Use this COM port number when setting up your tuning software.

Additional Navigation menu options, i. I can supply, repair or upgrade Megasquirts in UK. Open an existing project or if necessary, create a new project. If you don’t know how to do this, here are directions for getting into the Device Manager for XP and Vista.


The loopback test would fail if you tried it. Last edited by Beagle ; August 19th, Open Device Manager on your computer.

MSPNP v2 with 3.

Wish more info was available on connectivity issues from EFI. EM noise is the Electro-Magnetic noise created by current flowing in electrical devices. Return to MegaSquirt Page. Please note, however, that you should not require the use of a USB-serial adapter at all. The RS standard defines the voltage levels that correspond to logical one and logical zero levels for the data transmission and the control signal lines. Use only these manuals http: However, look the substantial difference in the signal voltage: Getting correct serial communications between your computer and Megasquirt is critical to enable tuning.

Maybe publish a simple list on their website would be a start?

Why is connection dropping when driving? |

Using the proper settings is crucial to successfully using your USB-serial adapter. I get a driver error in windows. Login or Sign Up. You may need to enter a password.

USB-Serial Adapter Connectivity

Please see our article on serial port megatine for directions on configuring a built-in serial port. But How do I connect to my car then?


If you have a question, comment, or suggestion for this FAQ please post it on the forum. Cables and Bluetooth References: There are several devices to fill this gap, but by far the most common is a USB to serial cable, this can fill the need and no one will miss the old Real DB9 on their laptop. Computer DB9 serial port.

Double check the COM port and baud rate. I power mine off the lighter to avoid the dropout. Last edited by TheSilverBuick ; August 19th, CPU socket serial loopback test. Also on more rare occasions there are problems with real serial cables such as pinch or break in the line. Even the drivers included with the adapter on CD may be megafune of date.

It was causing major confusion with a customer because it was “known good” working with other MS3s, but failed to work on MS3-Pro.

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