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As a follow up to TownDrunk....

SamGM2 actually started the program that I finished regarding flexible fuel tuning. This one really came back from the dead!

Some vehicles will work just fine by...

Love to see these types of mods making their way into the mass market. Wouldn't work for my location and 2013 but still cool to see. Also not sure I'd spend $500 for this mod. Will wear down the...

I was given one by another member of the forum, yes. Literally haven't tuned a thing since the initial EFILive setup on E55 though. At over 20,000 miles (~300 gallons) on mostly E70-E85. Runs great,...

I second this motion, have run into quite a few of the same issues!

Ditto. We've been having a lot of fun getting more fuel mileage out of the Volt's engine.

While driving all electric is fun, looks like HPTuners still can't get us more power to the wheels right...

I agree it should be locked to the VIN like in our EFILive programmer. Gets awfully expensive quick trying to experiment with strategies that have minor differences.

Sorry for such a delayed response, never got any updates on this posting.

I have since purchased a 2013 and am greatly enjoying it. While I did tune it with EFILive, I will probably be switching...

The Tune Repository doesn't have any Volt tuning files available, yet HPT covers them. Can someone PM me if you have one and I'll give out my email address? Thanks for any help!

LSX: I see 60 degrees on the map but have only experienced a max advance of 50 degrees while driving.

Great visual and explanation. I'd assumed it had to do with sensor offset but hadn't seen anything to confirm that. Is 10deg a standard offset or do I need to do some research into what...

So I understand why you wouldn't want to advance much beyond this point. What I can't figure out is why GM's OEM spark numbers are over 50 if the ECM will only output a maximum advance of 50 degrees?...

If the ECU is rubbish, then I'm not sure changing to E85 would be a factor at all.

My biggest concern would be whether the injectors are large enough. I upgraded the injectors on my WRX when I...

Bring out your dead....

The fuel composition sensor was dropped around 2005.

I've found that all 07+ GM E37 ECMs have the switch available to turn on flex fuel, but it did not work for our 07...

I've downloaded all the F150 files off the repository but none are indicated to be flex fuel, though it was a common option in all 5.4L 05+ F-Series. Please PM me if you have access to files that you...

Howdy y'all!

I am working on a rather interesting project to enable flexible fuel in Ecotec engines. We have swapped a 2010 E37 ECM into a 2007 HHR with minor wiring changes; however, the real...