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Makes sense, thanks.

Interesting. I'm noticing this car is reading around 77 ~ 78% (almost 80%) and it's giving the full amount of timing I put on the "Engine, spark, advance, Alcohol" table I think it is. I wonder...

I noticed under:
Engine, Fuel, Flex Fuel, Maximum Ethanol Percentage: 80%

Is that set that way because that's the limits of the GM flex fuel sensor? or set there so ethanol content over 80% is...

Thanks I tried a 2010 Silverado truck and found the settings for the Mult vs. Composition. The Flex Fuel Spark I will use to add spark into E85 for power just like you did. That's how I was hoping...

Does anyone know of factory flex fuel cars that used the same ECU as this 2010 camaro? I see the tune repo is back up and I could possibly figure it out that way.

So this got put on the back burner but revisiting.

Looks like under Engine, Open & Closed loop, flex fuel sensor. Change from disabled to enabled.

Engine, fuel, General, stoich AFR table needs...

I have a guys 2010 Camaro that's decided to add a flex fuel sensor. What do I need to change in the tune to support that and tune using the flex fuel sensor? Never really done a flex fuel...

Yup, it's already burnt me twice now. Very frustrating.

Agreed, this is a real burden not been able to identify stock files or what's stock or changed on cars that come in.

Looks like all the threads are been deleted. There were a lot of angry people in there.

Is this going to be the new system? Is the repository gone forever? That was one of the biggest draws to HPT. We now have no way of checking what's been changed on a car as there's no reference to...

Thanks for the feedback.

Thanks for the tip. Strangely every column there is a zero. I can't tell if this is stock or been modified as the tune repository on HPT home page is gone with no ETA of coming back :(

See...

I have a customer who's doing a 5.3 swap into something and dropped off his ECU for a bench flash to get it going. On the notes left with it one of the items says he has as drive by cable throttle...

This is my big headache now. I use the factory calibrations to see what all has been hacked up and changed on cars that come in. Without the repository this is just a mess. I'm shocked that this...

Thanks guys. I just read in what was on the car, been making changes and flashing back. No OS changes yet although I will be adding the two bar OS modification in the next few days but that's in...

Flashing a 2010 Camaro and the third module down (I think fuel system related), see attached pic. It has a Brickable warning there in red. Opted not to flash that one in case. How rare or common...

Ah great. Thank you.

That's good to know. So what physical sensor do you buy? because 2 bar is technically 1 bar above atmospheric pressure right? so that would be 14.7 PSI as a limit of the MAP sensor itself.

Good deal. Decided to get the MAF installed since HPT seems to only have an OS upgrade for a 2 bar MAP sensor and this car will see more than 14 PSI of boost. So we'll use the MAF.

So in reading in the tune I noticed this one has 3 sections to it. On the Gen 3 ECUs I've been messing with I don't recall seeing this. Looks like engine, trans, and something else. I think fuel...

That's good to hear it could run well on the MAP sensor only. I could always get the 2 bar sensor and do the OS upgrade. Is there a specific 2 bar sensor I should get?
The turbo kit is already...

That sounds along the lines of what I've been reading. Apparently the virtual VE table came about due to variable cams, DOD and possibly other things making the complexities of an actual VE table(s)...

Glad I found this thread, lots of good info. I was about to pull the trigger on HP Academy. Anyone used that? I've watched the free content and it's so well put together, guy is very well spoken,...

Hey Guys,

Trying to grasp the concept of the virtual VE table in the gen 4 ECUs. If it's not a real table in the tune what exactly are you tuning and how is the ECU processing MAP sensor input to...