Flex fuel sensor

[Milkman83]

Who has added a physical flex fuel sensor? Which sensor did you use and where did you pin it in the ecu?
I’m looking to add one to my 13 Denali.

 

[Fless]

@iamdub did it but he's on hiatus for a while. His story starts about at the link below (and he provides detail links a few posts down from that):

Loving my E85 right now

I thought it was more of the fuel content sensor (or whatever its called) that told the ECM what duty cycle to run the injectors at, Not the O2 sensors? Edit: Flex Fuel Content Sensor is what its called.

www.tahoeyukonforum.com

 

[Milkman83]

@iamdub did it but he's on hiatus for a while. His story starts about at the link below (and he provides detail links a few posts down from that):

Loving my E85 right now

I thought it was more of the fuel content sensor (or whatever its called) that told the ECM what duty cycle to run the injectors at, Not the O2 sensors? Edit: Flex Fuel Content Sensor is what its called.

www.tahoeyukonforum.com

Thank you

 

[Milkman83]

@iamdub did it but he's on hiatus for a while. His story starts about at the link below (and he provides detail links a few posts down from that):

Loving my E85 right now

I thought it was more of the fuel content sensor (or whatever its called) that told the ECM what duty cycle to run the injectors at, Not the O2 sensors? Edit: Flex Fuel Content Sensor is what its called.

www.tahoeyukonforum.com

Hey thanks again. That was exactly what I was looking for. I just did a dod delete with a gpi cam and my tuner wanted me to get a physical sensor before he turned flex fuel back on.

 

[petethepug]

If you have links and or part #’s post em up please. I’ve got to do that to my 09 Esky to ensure GM’s current system of e85 tuning by exhaust gas only doesn’t have to guess as hard.

 

[KidWgn]

Flex Fuel Kit for Gen IV GM Truck

The DSX Tuning flex fuel kit is the original plug and play solution to adding flex fuel on Gen IV/Gen V GM V8 vehicles. Use these kits to add the ability to run anywhere from straight gasoline to straight ethanol as well as reveal the true power potential of your setup. Forced induction...

dsxtuning.com

Shop is local to me, great guys.

 

[Milkman83]

Installed my sensor this past weekend. I followed a thread from performancetrucks forum. Ended up making my own fuel line. I also bought a breakout harness from ballenger motorsports for the power and ground. It plugs into an ignition coil so you don’t have to splice the wires.
Parts I used:

Ballenger Motorsports CONN-85931

2 Russell Push-On EFI Fittings 611233 from summit

Summit Racing™ Premium Braided Nylon Hose -6 AN 3 ft. SUM-240603BP

ACDelco GM Genuine Parts Flex Fuel Sensors 13507128

Hoypeyfiy flex fuel sensor harness from amazon

GM part #13575575 - Wire for pinning pcm

Truck is cammed and remote tuned by GPI so I already had a flex fuel file to load in once I had it hooked up. I didn’t take a picture of it installed but I will get one.

 

[Milkman83]

This is how it looks now. Should tuck under the cover nicely. I’ll probably tidy it up a bit before I call it done.

 

[CMoore711]

So your Denali has the same 6.2 L94 flex fuel motor in my Escalade ESV; Help me understand the benefit of adding a physical sensor vs your truck already being able to run flex fuel from the factory?

 

[swathdiver]

Help me understand the benefit of adding a physical sensor vs your truck already being able to run flex fuel from the factory?

The virtual calculation takes time, the sensor is instantaneous. The virtual calculation can become distorted with older and aftermarket oxygen sensors. It stands to reason that the sensor is more accurate allowing for more precise ethanol tuning if desired.

 

[Milkman83]

So your Denali has the same 6.2 L94 flex fuel motor in my Escalade ESV; Help me understand the benefit of adding a physical sensor vs your truck already being able to run flex fuel from the factory?

Just as swathdiver said. The factory virtual sensor is inaccurate and slow.

 

[WindyCityDenali]

I have a 2008 6.2 denali that to my knowledge does not have the flex fuel factory add on at all. Would this set up for for me with custom tuning? What injectors are you running? any other fuel side needs?

 

[WindyCityDenali]

Flex Fuel Kit for Gen IV GM Truck

The DSX Tuning flex fuel kit is the original plug and play solution to adding flex fuel on Gen IV/Gen V GM V8 vehicles. Use these kits to add the ability to run anywhere from straight gasoline to straight ethanol as well as reveal the true power potential of your setup. Forced induction...

dsxtuning.com

Shop is local to me, great guys.

Curious if you have experience with this? I have a 2008 denali 6.2 that to my knowledge doesn't have flex fuel from the factory, any idea if this would work? Assume E38 ecm based on their info.

 

[KidWgn]

Curious if you have experience with this? I have a 2008 denali 6.2 that to my knowledge doesn't have flex fuel from the factory, any idea if this would work? Assume E38 ecm based on their info.

It should. I don't see why not. This adds a physical flex fuel sensor and pins out to the ECU 5v reference.

You should shoot Dave/Matt an email to confirm, though.

 

[quickfixes]

Shoot, I gave up with the error codes and went with a physical delete, leaving the original sensor I stalled and plugging in this delete module instead. https://www.sawyertuning.is/product...elete-module-eliminate-your-flex-fuel-sensor/
So far so good...

At $100 for the physical delete module, I think the $500 difference between purchasing a new flex sensor is better off in my pocket. It doesn't conflict with my existing tuning either.

 

[Fless]

Shoot, I gave up with the error codes and went with a physical delete, leaving the original sensor I stalled and plugging in this delete module instead. https://www.sawyertuning.is/product...elete-module-eliminate-your-flex-fuel-sensor/
So far so good...

At $100 for the physical delete module, I think the $500 difference between purchasing a new flex sensor is better off in my pocket. It doesn't conflict with my existing tuning either.

What vehicle did you remove the FF sensor from?

 

[petethepug]

The Gen III 07-14 5.3L & 09-14 6.2L motors don’t have the typical e85 calculation data harness or sensor. e85 is calculated by data from the o2 sensors so no sensor to connect to on Gen 3 or 4. We can add one though.

This is still good info because I’ve got an 01 S10 with e85 and that pricey sensor.

Shoot, I gave up with the error codes and went with a physical delete, leaving the original sensor I stalled and plugging in this delete module instead. https://www.sawyertuning.is/product...elete-module-eliminate-your-flex-fuel-sensor/
So far so good...

At $100 for the physical delete module, I think the $500 difference between purchasing a new flex sensor is better off in my pocket. It doesn't conflict with my existing tuning either.

Sorry for the Caps… it’s cut n paste

2005 Chevy Avalanche 1500 (FLEX FUEL ONLY)
2000-2002 Chevy S10 Pickup (FLEX FUEL ONLY)
2002-2005 Chevy Silverado 1500 (FLEX FUEL ONLY)
2002-2005 Chevy Suburban 1500 (FLEX FUEL ONLY)
2002-2005 Chevy Tahoe (FLEX FUEL ONLY)
2002-2005 GMC Sierra 1500 (FLEX FUEL ONLY)
2000-2002 GMC Sonoma (FLEX FUEL ONLY)
2002-2005 GMC Yukon (FLEX FUEL ONLY)
2002-2005 YUKON XL 1500 (FLEX FUEL ONLY)