Shout out to DSX , they nailed it with their well built Flex Fuel sensor kit for our C7 z06. Super clean install process , im sure everyone has seen a video or two about it . On all the videos i did watch no one really showed clearly the process to make room to re pin the ECU blue connector . SO i just wanted to add some images for reference for anyone looking for this info in the future.
1) i removed the wheel
2) removed all screws and clips in fender liner.
3)i had to remove 3 rivets from my side skirts to release fender , they are black and they dont come with the kit so be warned you will need them if you have an aero kit on your car .
4) removed all top torx screws for bumper , one is hidden int rear corner under the plastic trim where the end of the wiper is pointing.
5) have a magnet handy to remove the 10mm bolt next to the oil tank .
once all that is done there is lots of room as you can see in the images to snake the harness out to have all the room in the world to run the pin in .

The pin number is 38 , and there is a small protector in there that must come out , i used a electrical diag probe pin to push it out after you take the blue cover and the back clip off.
Cutting the wire harness zip tie makes it easier to locate pin from the top . Pay close attention to pin orientation when you push it in . That's pretty much it , rest is run the wire. I did add some loom to mine to make it look cleaner and give it a little more protection . Any questions let me know . This can easily be done with a jack and some jack stands no problem so dont be scare to tackle it on a weekend.



The loom i added to the small black wire needed to be ran to ecu

That’s the pin can barely see it though

That is the protector that has to come out

If you loosen the bolts mentioned you can see how much room you have.

I used my trim tools to hold fender in place

I slid the fender over the side skirt but added tape to it to protect it

 

Which Flex fuel sensor did they send you? Can you post a pic of it?

 

sure here you go , looks like a GM continental sensor

 

Test it before you plug the fuel lines in. Mine read 10 points lower than the actual E content. I purchased another sensor that was the the same part number 13507128 and it read low as well. My buddy has a 22 Camaro SS and his read pretty close. He had a different sensor part number 13577379. I bought one and it read pretty close as well. Plug it in leave one side capped and put E in it and check your HP Tuners or your Fuel It app if you bought a dongle and see. You have to know the exact E content to know how far off it is. I tried with pump E, VP X-85 and One Ethanol R and they all read 10 points low.

 

if I’m not mistaken there is a table in HP tuners where fuel flow before re read is set . I know in the z06 it’s something like .28 L before it re reads . Try running the car for a bit longer ? Not sure if you did that already . You can change the number to zero i believe as well so there is no wait time.

but thanks for the heads up , I’ll try it when i get the car back together.

 

HP Tuners has nothing to do with it. The sensor is sending a voltage to the PCM and that is how the car sees the E content. I had the old sensor on the car for a year and never noticed that it was off. It even read the E content in pump gas correctly as E10. I used to have to mix the E with 93 and keep it in the E60 range. I didn't know how far off it was until I upgraded my fuel system so I could run full E85. My tuner wanted me to get the E content up to E82-83. I tested the Pump E and it was E78 but the car read it as E68. I put straight VP X-85 in and it read E74. I had to add E98 to the VP X-85 to get it to E83. I am pretty picky **** about wanting the parts to work as they are supposed to. Some people don't care. I have the Fuel It dongle so I can read the E content from the Fuel It app on my phone and it was exactly the same as what HP Tuners saw as the E Content since both are just taking from the signal the sensor is providing.

 

Got it , that's good to know ill check it when i get the car up and running . Thanks for the heads up .

In regards to HPT , here are some things you can change in HPT not sure if it would have helped you at all . As you can see in the software there is even a frequency adjustment for the sensor. I will check it though just in case with my Oscope to see what the frequency this sensor sends out and if it matters if i change that table.

Did you ever ask DSX about the issue ? interested in what they said if you did.

 

Some good info here.

 

The default frequency is if the sensors fails
I emailed DSX and explained the E content wasn't reading correctly and all he said was " The sensor is correct"... Obviously it wasn't after testing different fuels and replacing the sensor with one that actually worked properly. Its kind of like your car showing you only have 3/4 tank of gas after you just completely filled it up. You call the tech people and they say its reading correctly. You know damn well its not, so you replace the fuel sending unit and now it reads a full tank like its supposed to..

 

damn not good , i would be upset . Again thank you for info . And thank you for clearing up the frequency thing on hpt.

 

This new sensor being developed by Advanced Fuel Dynamics, an aftermarket company looks promising. The OEM Continental sensor was never designed for the fuel demends it is currently being used for. That, and all the reading I have done points to the OEM sensor having a high degree of variance from sensor to sensor. AFD E-Sense Fuel Consumption Sensor | Advanced Fuel Dynamics

 

Looks promising!!! Hopefully it will be a lot more accurate.

 

I messaged them about the new sensor and they are available for sale, just not listed on their site yet. They are supposed to be within 2% accuracy. I ordered one today so I will test it out when it comes in.

 

Awesome!, Price?

 

$249 but its a billet piece. I will take some pictures when it arrives and let you know how well it reads as well.

 

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for you guys that did the install what coil did you use to plug the harness into ? i used the #7 but it just does not look as clean as i want it . Im wondering if once i have my SC on i can hide it better.

 

I used #7