DIY Flex Fuel kit

[razorlab]

For people that want to save a couple hundred bucks and don't mind using posi-taps this is for you!

$400 total DIY flex fuel kit.
Compatible with both BootMod3 and Ecutek

Precision Raceworks Ethanol 360 fittings
$89.99

Zeitronix ECA-2 CAN
$239

Continental Flex Fuel Sensor #13577429
$59.99

Flex Fuel Sensor Pigtail
$7.59

Posi-Taps
$8.41

You keep your OEM fuel line and use the PR 360 fittings to install the flex fuel sensor inline. Super clean and reliable install. Everything tucks away out of sight as well!

For power, you can tap at the ECU, or use a add-a-fuse in the passenger side kick panel at Fuse F47.

For ground, you can ground in the passenger side engine bay cubby, which is the same area where you can bring the wires from the engine bay into the interior.

For CAN connection, you can connect at the ECU or the passenger side kick panel, twisted pair, yellow with white stripe and yellow with black stripe.

At the ECU:

CAN is A46*1B, pins 41 & 42. Wires are yellow with white stripe and yellow with black stripe.
Power is A46*5B Pin 06. White wire

Easy peasy. Power, Ground, CAN high and low and pow! You now have flex fuel input to your Bootmod3 or Ecutek tune.

Here is it being logged with Bootmod3 on my personal supra:

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[Shelby Miles]

Nice write up and great info, thanks for sharing and just in time as I piece together my power upgrades. Flex-fuel in on my list. Posi-taps don't bother me any, they've always worked fine in the past.

 

[razorlab]

Nice write up and great info, thanks for sharing and just in time as I piece together my power upgrades. Flex-fuel in on my list. Posi-taps don't bother me any, they've always worked fine in the past.

Awesome, let me know if you have any questions!

 

[a90trackedition]

guys, I'm a noob with this flex fuel stuff. There's a 94 octane FF pump near my house that is significantly cheaper than even 87! Is it possible run this fuel with a locked ECU?

 

[razorlab]

guys, I'm a noob with this flex fuel stuff. There's a 94 octane FF pump near my house that is significantly cheaper than even 87! Is it possible run this fuel with a locked ECU?

You can run E20 with the oem ECU. Most pump gasoline in the USA is E10.

 

[a90trackedition]

here's a 94 octane FF pump near my house that is significantly cheaper than even 87! Is it possible run this fuel with

You can run E20 with the oem ECU. Most pump gasoline in the USA is E10.

so do I need any special kit to read the ethanol content or just pump and go? Thanks @razorlab . You're always so helpful. By the way, I'm loving the GT500 hood louver you recommended.

 

[razorlab]

so do I need any special kit to read the ethanol content or just pump and go? Thanks @razorlab . You're always so helpful. By the way, I'm loving the GT500 hood louver you recommended.

Sorry, I was mistaken, up to E25 can be used, see page from owners manual below.

I'm not sure what you mean by a 94 octane FF pump? Can you expand on that?

If you are lucky to have access to pre-mixed pumps, and they offer E20, then just pump and go. If not, and you just have an E85 pump, then you need to calculate the proper mix to get E20-E25. https://www.morepowertuning.com/emix

There are a bunch of mobile apps as well.

 

[a90trackedition]

This is what it looks like.

 

[razorlab]

This is what it looks like.

I'm going to assume that is E85 and they just didn't update the sticker. You can ask the station.

Or even test it yourself: https://fuel-it.com/products/ethanol-content-tester

 

[Mason]

I have a zeitronix box that I’d be willing to sell. Don’t need it now that I’m PI

 

[Gotink]

This is what it looks like.

Why is regular the most expensive? That just methed up .lol.

 

[BoostAddict13]

Appreciate the write up. Definitely used quite a few things along the way of my Innovate ethanol gauge install over the weekend.

 

[razorlab]

Appreciate the write up. Definitely used quite a few things along the way of my Innovate ethanol gauge install over the weekend.

Glad it helped!

 

[OldHead-MKV-Owner]

Great writeup, thanks @razorlab

 

[Carmelo Iverson]

@razorlab thank you, I had no idea where to tap into the ecu

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