EFI Expert and Author Greg Banish offers up a guest blog post offering insights on Fuel Rail Pressure Fluctuations, how they can impact the fueling of your EFI System, and what you can do to minimize any negative impact they could have!

It’s Natural Its natural and I think we all know that. You get your first bicycle as a kid and run outside to meet up with the other neighborhood kids and the first thing you hear from your buddy is “I bet I’m faster than you on my bike!”. You can’t help yourself but make…

Guest Blog Entry by Jeff Linfert Jeff has been a long time user, reseller, installer, and tuner of our products for many, many years now and has offered up some of his thoughts and insights on how to help you get the most out of your car and engine management system. If you need installation…

Save big on Innovate Motorsports wideband o2 systems now through September 30, 2021 with Innovate’s Tunabration Celebration. Innovate is offering $25 to $50 rebates on the following models: Eligible Models for $25 Rebate:LC-2 with Blue DB Gauge 3795LC-2 with Red DB Gauge 3796LC-2 with Green DB Gauge 3873MTX-L Plus Digital Combo Gauge 3918MTX-AL Analog Combo…

High performance Miata builds need high performance ignition systems; the stock ignition coils typically won’t cut it if you’re running a lot of boost on your turbo Miata or supercharged Miata or otherwise increasing the cylinder pressure (high compression n/a builds). We’ve done several of own turbo Miata builds. We’ve worked with a LOT of…

MicroSquirt has long been the go to choice for a low cost, super capable standalone ECU. Our original intention for MicroSquirt was powersports, ATVs, and motorcycles — small engines — but shortly after launch, our customers installed it in everything from golf carts to turbo V8 race cars. Having to have the board modified to…

At DIYAutoTune, we believe in supporting local manufacturing, and when we need to outsource parts like Printed Circuit Boards, some of our wiring harnesses, or enclosures, we always keep production in the USA. AMPEFI MSPNP and MS3Pro Engine Control Units as well as DIYAutoTune’s other MegaSquirt assembled ECUs all have final assembly at our production…

Many engines from the 1990s and later already have enough sensors to fully support sequential fuel injection. But what if you’re converting an older carbureted engine to EFI, or want sequential injection on an engine with an early bank to bank EFI system? Sometimes, you may be able to get an easy bolt-on solution from…

The MS3Pro EVO harness is very similar to the original MS3Pro harness – the major differences are that we have repurposed the USB and serial wires for extra analog and VR inputs, and since the MS3Pro EVO has an internal MAP sensor, the MAP wire has been renamed Analog In 6. All other pins besides…

15 years ago, I founded DIYAutoTune.com by merging a passion for technology (I was an IT guy) with a passion for racing (I was/am a car junkie).  I had $1200, a spare bedroom, and an idea. It has been a blessing of an opportunity and quite a ride.  DIYAutoTune has grown and evolved beyond what…