It's Alive

Had to rig up the MAF since I ordered the wrong harness, but I was able to push out the LS376/525 tune and it runs the best is has so far.

Exhaust

I had the exhaust done last week by my friend Tommy Morehouse.  He did it at his workplace, S & S Motorsports.  The quality of this exhaust completely blew me away and was worth every penny.  It is 3" stainless throughout, including the mufflers and x-pipe.  Even the hangers are made from stainless rod.  Thanks again, Tommy.

Wiring, Wiring, Wiring

Not a lot of photos in today's post.  I have been trying to debug several issues.  I apparently did not secure the driver's side O2 sensor harness and ended up melting it against the header.  I had to repair that today and hopefully I did it correctly.

Pic of new connector:

My next issue is that the harness from Current Performance is configured to use a Trailblazer SS Mass AirFlow Sensor (MAF).  However, the engine is an LS3, and I wanted to use the LS3 style MAF sensor.

Here is what the TBSS sensor looks like:

and here is what the LS3 sensor looks like:

The problem is two-fold.  1) The data gathered from the sensors is different and that affects the tune.  I wanted to ensure that an LS3 tune would work properly without having to do a bunch of MAF-specific changes for the TBSS MAF.  2) The arrangement of the pinouts are different between the two MAFs.  The TBSS MAF pinout is below:

This is how the truck is currently wired.  The LS3 MAF pinout is below:

I need to move A to D, B to E, C to B, D to C, and E to A.  This should allow the LS3 MAF to work with my existing harness.

Finally, my gauges still do not work.  Contacting Current Performance has been fruitless, either by email or phone.  The best answer I have received from them up to this point has been "so either something with the wire are no ECU output".  I decided to try and tackle this problem myself.

There is a single wire from the ECU (2011 Cadillac CTS-V E67, in my case) that runs all Class 2 Serial Data.  Pin 16 on the C1 connector (Dark Green wire).

That wire runs into a splice pack (SP201) and connects to all of the modules in the car (BCM, IPC, etc)

I checked for continuity between the splice pack and pin 16 on the connector and we are good.  I connected a Tech2 scanner that a friend (Dustin Helton) let me borrow and was able to communicate with all of the modules and I was able to "sweep" the gauges; That is, I was able to communicate with the gauges with the scanner and could make the needles move using some options in the scanner.  This tells me that the wiring is good and the ECU is not publishing Class 2 serial data.  I have tried to track down information about the E67 ECU and serial data and there just is not much information out there.  I did find a blurb where someone had to have a GM tech "enable" Class 2 serial communication as that was disabled from the factory since newer ECUs communicate using CAN.  The Tech2 scanner only goes to 2008, so that I am not able to check the 2011 ECU using the tool.  Dustin knows someone that has a newer style scanner that should be able to do the trick.  

Will update when I have more info.

Getting much closer

The holiday break was a good time to get things done.  I asked a friend of mine (Tommy Morehouse) if he would do some fabrication work on my intake tube.  The original below.

With the tube like this, the hood would not close and it would rub against the radiator mounts.  So, Tommy took a crack at it.

Tommy

It came out awesome.  Pics below.

Tab welded on to add support

Vent

 Took some shots of the interior as well.

Bonus exterior shot