Great info, pics are worth a thousand words.

X1 Pin 38 is the Flex fuel sensor spot (should be empty on the factory ECU)

Just need a GM "Pin" (Don't know if the E92 uses the same Pins they have been using for years on GM computers or not though) basically jut slide the pin into X1 38 and it will give the signal to the ECU.

 

I understand trying to get cheap reliable HP. This sounds like it is an awesome deal and breakthrough. But, warranty.... Comes up. If someone mods the car with this... Warranty is up. So, for some trying to extract extra HP from the C7.. This isn't any different than adding a blower. I'm not putting this down. Just placing my thought out there. $ for HP = great value fore sure

 

I know where you are coming from, and trust me I have thought about it. I do have headers, short shifter, tune, and intake already, which I can swing around and get work done, but the sensor might tip the jar. That said, I know people, and have worked at the dealership for 7 years. In my case, i should be fine. With that said, i don't believe the motor is going to blow up or anything, but if in a case it does, I will pull the sensor and work some magic.

Moving forward, I would like to just talk about this project and not w arenty politics thanks Sugey

 

Thanks T/A! I will review the wire blue prints and see if there is a way I can avoid having to go through passenger side fender to locate the computer. If i was looking at it correctly, you can access it through the 02 sensor wire. I will share my findings later this week.

 

You cannot avoid adding a wire to the ECM connector.

 

ok, thanks

 

Is the LT4 DI pump able to directly bolt up to LT1? Is the LP pump in the tank of a Z06 a higher GPH than in the LT1?

Based on my experiences with my DI EcoBoost engine, my engine didn't start to lean out until my DI fuel pressures dropped below 1200 PSI. However, I was also spraying a 70% methanol mixture into the CAI inlet tube just in front of the TB. My tuner, Torrie McPhail felt that I would need to increase my fuel delivery system by 50% if I were to run E85 and be tuned for it. Using a Kenne Bell Boost-a-pump helped my system but is not the end-all solution.

 

OK guys, I was able to finish the final wire to get the signal into the ECU.

The location of the ECU is in the front passenger fender, and can be accessed without removing the fender from the car, however you must be VERY careful to not over flex the fender and crack the fiber glass.

-Turn the wheel all the way to the right to expose the inner fender Bolts

-Remove all the moldings on the bottom of the fender, and the T-bolts located under the hood that connect the fender to the car. Additionally, there is one bolt within the door jam to be removed.





-Once all is lose, you will need to pull the fender out (just a little), and pull back the inner fender to expose the ECU. If you look past the ECU you will see one more bolt that you can access with a long ratchet extension.





-Next you will want to remove the ECU from the body of the car (2 clips that can pressed back easily to remove all tension within it's grip)

- Once removed from the body, you will remove the X1 wiring harness (this harness is the one closest to the passenger side wheel well). When removed you will know it's correct by seeing a blue plastic clip board ( see picture for example ).

- slip the wire harness (X1) out where the door meets the fender. Should be plenty of room to wiggle it out





- Next remove all the plastic holding the wires together. Simply cut the zip tie, and the housing unsnapped very easy. I had to cut some of the electrical tape to loosen up some of the wires to investigate.

- Please review the picture below to see where the new wire will go. If you have a diagram handy ( I don't have it at this time ), you will see it needs to go in Pin 38. This space is currently not occupied by any other wire.





- Once you have located the hole, it will need to be punch out as a plastic piece is taking its place.





- Now feed the single wire from the Flex fuel sensor into the inner fender.





- Next, from the back of the wire board insert the pig tail into it's new location.





- When installed, you will need to snap on the blue plastic clip board back on the wiring harness. If done correctly, the new wire you have installed will not come lose when you try to pull it out from the back of the harness.

- rezip-tie the area from earlier, and replace the electric tape you removed earlier

- OK now put everything back together.

Please work slowly, and take your time to do this properly. It's not an extremely hard job, but anything that has to do with wires should be taken with caution.

My car started up perfectly, and I have had ZERO issues with anything. Now I just need to find someone willing to help me tune!

 

Thanks for the detailed pictures and explanation. Have you logged any data with EFILive or HP Tuners to see if the sensor is reporting the expected ethanol% content?

 

No, need a tuner to help. I have a surface pro 3, with Trifecta hardware and software however, they are not even responding to me for help. I have been a reseller for 8 years, and they are ignoring me. kinda frustrated because I was told not even 8 months ago they would help. I shouldn't even be venting on here, but i'm a little upset

 

That's too bad that they are not helping you out.

If you were in Colorado I'd gladly hook up EFILive...

 

If you ship me your ECM, I should be able to flash it on a bench, as I have the E92 harness. I do not have unlimited licensing for C7 though.

 

Thanks guys. I think I will be able to still work with Trifecta. I was able to get some feedback from them just a few moments ago. It seems they want to do a full on tune but they will need a car to do in house calibrations for resale. Will keep everyone posted.

 

Question about Trifecta. Does their tuner lock the PCM?

 

like software lock?

 

Yes. Various tuning software has the capability of locking the PCM so that the tune cant be read of modified by anything else. Just curious if they do that.

 

Yes, it locks the ECU so HP tunes can not modify tables afterwards. The only way to lift the lock is to take it to the dealer

 

Ok, thanks for the info!

 

Just FYI, HP Tuners can already enable flex fuel and everything associated with it.

 

Can anybody comment on how close this is to the C6 install procedure? Any differences at all with loosening the fender or maybe a different connector pin?