Search Results for: Mazda Miata MS3Pro PNP ECU/feed/rss2
Is a wideband o2 sensor better for tuning AFR than a narrowband o2 sensor? Isn’t my 1/2/3/4/5 wire stock o2 sensor good enough?
Wideband o2 sensor versus narrowband o2 – what’s the difference? A wideband o2 sensor system will give you far greater tuning ability than a narrowband o2 sensor. The challenge with a narrowband sensor is that it is only truly accurate at 14.7:1 AFR (the stoichiometric air/fuel ratio for gasoline). The factory will most likely…
Read MoreCan I use the stock IAT and CLT sensors with the MegaSquirt?
Yes you can in almost every case– the exception is that you sometimes remove your stock IAT sensor when you remove your MAF/AFM as it’s often built into stock MAF or AFM on many cars. If this is the case, you’ll need to add another IAT sensor to the intake tube, usually just before the…
Read MoreHow does a MegaSquirt compare to having my car ‘Chipped’?
It is possible to get many of the same performance benefits of the MegaSquirt by having your car chipped IF the tuner chipping your car has your car onsite and custom tunes the map for your specific configuration on a steady state/load bearing dyno. If you are not the hands on type, or you don’t…
Read MoreHow difficult is it to assemble a MegaSquirt myself?
It takes most people new to electronics assembly 6-10 hours for their first time assembly of a PCBv3 ECU, a bit less for a PCB2.2, and the stimulator (which you should do first) is very simple and takes maybe an hour to assemble for a first-timer. Check out Youtube for some good solder technique videos…
Read MoreWhat do I need?
Another question that doesn’t have a quick short answer… but the quick short answer is: An ECU (there are a few options here of course), a stimulator (95% required), and a tuning cable. Optionally you may need a USB-Serial Converter if your laptop doesn’t have a DB9 serial port, and/or a Wideband O2 system such…
Read MoreWhat the heck is a MegaSquirt?
The MegaSquirt line of Engine Management Systems are Do It Yourself (DIY) systems capable of full standalone engine management at a fraction of the cost of the what the ‘big dogs’ charge. They were designed with education and performance in mind, so that the do it yourselfer could learn the in’s and out’s of engine…
Read MoreCommon MegaSquirt Modifications
Adding a second wideband o2 sensor to the MegaSquirt-II 2. Adding an relay control circuit to the MegaSquirt PCB-3 3. Adding a ‘Pullup Resistor’ to the ignition input Adding a second wideband o2 sensor to the MegaSquirt-II If you’re running an engine with true dual exhausts, you could use a single wideband sensor for both…
Read MoreMegaSquirt and EMS Related Technical Articles
Note– these are here to help guide you and provide information. As with anything involving electronics, computers, and cars bad things can happen without proper research and planning. Do your homework. We cannot be responsible for any of your actions or their results whether based on this information or not. Be smart, and be safe……
Read MoreDIYAutoTune.com Technical Videos & How-To’s
MegaSquirt Related Install Videos MegaSquirt-II EFI Configuration and First Start Flashing the MS-II Firmware (example uses 2.888) Configuring the MS-II ECU for the engine/injectors/etc Starting the car and getting a proper idle Passing a MegaSquirt Relay Cable thru your firewall safely Removing pins from a DIYAutoTune Harness or Relay Cable Tuning Software MegaMeet…
Read MoreCarb-to-EFI Conversion
Project Goals To learn, first hand and hands on, all that can be learned about the pros/cons of carbs vs. EFI. What manifolds work best, what off-the-shelf TBI systems work best. To be completely non-biased in our approach, sure we’re EFI guys, but if the carb shows a pro over EFI somewhere, great! I’m confident…
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