Flex Fuel Sensor install
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
That said, it seems others have done the sensors on the C6. I would imagine it's nearly the same process, even down to the same sensor. The ECU's might be different however, and the Pin might be located in another location.
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
Dave, good to see you in this thread. Dave is GM using the same ECU Pins they have been using on all GM computers for years now??
I have a bunch of ECU pins for the older 411 ECUs, here is a pic, just wondering if this would plug into the E92
LS3_E85 great info and pics, anyone wanting to do this swap will have this to go off of, thanks again for the contribution.
I have a bunch of ECU pins for the older 411 ECUs, here is a pic, just wondering if this would plug into the E92
LS3_E85 great info and pics, anyone wanting to do this swap will have this to go off of, thanks again for the contribution.
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
Thanks T/A! I'm just excited to have finally gotten my project completed. I have spoken with Trifecta Tuning, and they are planning on either shipping my car to their location, or flying out to my home in Indianapolis to develop a tune for resale. All this work will have been well worth the effort. Car should be ready for spring
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
Well blower cars max out on pump around 580ish, so take 25% off that and you are probably going to max out the stock fuel system in the low 400s. So I think these would work great on a mild bolt on car, or using it to blend for octane, but without fuel upgrades I don't see a stock fuel system c7 making 500+ on e85. Maybe I'm wrong though.
I agree, I would think upgrades to the fuel system would be needed to gain any meaningful power much more than 100 hp over stock as you need to flow 30% more fuel and the stock system doesn't have the head room
great for a stocker to gain a few poinies, but wouldn't direct port meth work better to add more fuel?
you can stay with the factory tune and use a small ecm like a megasquirt or something to control another set of injectors
I'd love to see tuning on dual fuel with the c7 and how to mix a piggy back computer on top of the factory tune to add fuel under wideband 02 control as needed
that way I don't need to jack with anything on the factory ecm, and can swap back the factory manifold if there are any warrenty issues which is pretty easy on the new vettes
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
LS3 you get it going yet?
I have a round of mods I am about to do and the sensor is one of them.
If Trifecta hasn't set you up with a tune and you want to see if everything is working properly have someone with HP or EFI live scan Alcohol content on the scanner, 93 octane usually shows around 4-8 percent.
I have a round of mods I am about to do and the sensor is one of them.
If Trifecta hasn't set you up with a tune and you want to see if everything is working properly have someone with HP or EFI live scan Alcohol content on the scanner, 93 octane usually shows around 4-8 percent.
Safety Car
Joined: May 2006
Posts: 4,016
Likes: 93
From: St. Louis, MO
Tech Contributor
LS3 you get it going yet?
I have a round of mods I am about to do and the sensor is one of them.
If Trifecta hasn't set you up with a tune and you want to see if everything is working properly have someone with HP or EFI live scan Alcohol content on the scanner, 93 octane usually shows around 4-8 percent.
I have a round of mods I am about to do and the sensor is one of them.
If Trifecta hasn't set you up with a tune and you want to see if everything is working properly have someone with HP or EFI live scan Alcohol content on the scanner, 93 octane usually shows around 4-8 percent.
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Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
I just installed the beta tune this morning. Awaiting confirmation that the signal is being picked up on my data log. If all goes well, I will fill it up with E85 tonight. More details to come!
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
Nothing will report if the flex fuel feature is not activated in the tune.
I just installed the beta tune this morning. Awaiting confirmation that the signal is being picked up on my data log. If all goes well, I will fill it up with E85 tonight. More details to come!
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
Ok, Sensor works! My install is officially a legit step by step successful tech guide! Currently it's reading my 93 pump gas at 10.6936% Ethanol. When I get off work, i'm going to put 5 gallons of E85 in the tank to see if that reading goes up. If that goes well, i'm going to fill the tank up and drive on it until Empty. Next steps will be another refill of pure E85 then dyno tune!
If you can't tell, i'm extremely excited! 
If you can't tell, i'm extremely excited!
Drifting
Joined: Jul 2005
Posts: 1,646
Likes: 188
NICE!!!
Glad all the wiring worked like it should. I am going to do my Power just like you did (that's what I have been worried about)
That's a little high for 93, but I am glad its reporting (know its working)
EDIT: E85 is a $1.75 here vs $2.85 for 93 (on the rise too)
Glad all the wiring worked like it should. I am going to do my Power just like you did (that's what I have been worried about)
That's a little high for 93, but I am glad its reporting (know its working)
EDIT: E85 is a $1.75 here vs $2.85 for 93 (on the rise too)
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
Thread Starter
Drifting
Joined: Mar 2011
Posts: 1,519
Likes: 7
From: Indy
Update: I put 5 gallons of E85 in last night, and the ECU is now picking up 50.3% Ethanol!!! I'm going to burn the rest of this tank, and then fill the tank up with only E85. Great news! Now just need to schedule some Dyno time to build a powerful reliable tune
6th Gear
Joined: Mar 2015
Posts: 6
Likes: 0
From: stone mountain GA
6.2 silverado flex fuel looks like all it needs is a sensor
Hey guys read this today and doing some research on my 2015 6.2 silverado under the truck near the gas tank is a plug that will fit the 13577429 flex fuel sensor check the 12v and gound bingo power
Then I followed the white singal wire leading near ecu so far so good
Then open the x1(if it's the top one on the ecu) connector pin #38 Has white wire
so am I going right way about this
is this the right connector and pin
Ordereding 13577429 sensor
Have hp tuner
Thx for any more advice
Then I followed the white singal wire leading near ecu so far so good
Then open the x1(if it's the top one on the ecu) connector pin #38 Has white wire
so am I going right way about this
is this the right connector and pin
Ordereding 13577429 sensor
Have hp tuner
Thx for any more advice
6th Gear
Joined: Mar 2015
Posts: 6
Likes: 0
From: stone mountain GA