HPT and Wideband Offsets

[MGM1979]

http://www.hptuners.com/forum/showthread.php?t=11018

[Doc]

another thread (http://www.innovatemotorsports.com/forums/showthread.php?t=4992)

and another thread (http://www.audiohelix.com/tuning-documents/lc1/lc1.htm)

[Doc]

here....http://www.cobaltss.net/forums/showthread.php?t=7241

[Doc]

its your job to transfer all the data to this thread mgm ;)

[MGM1979]

those shortbuss links don't work for me...that's prob why I never bookmarked the first one.

[Doc]

slacker....let me know if the pics work for you


Heres my how-to for obtaining a 12v switched or continuous source and a place for ground.

First pull off both side panels on the upper console area as shown in my Dashboard Disassembly how-to.

The driver side will give you access to a good grounding stud and a source for 12v continuous power. To access the 12v continuous power, reach up and behind the 12v accessory plug. You will feel a small two wire harness coming from it. The harness has two wires, one black (ground) and one red (power).
http://cobaltss.net/gallery/files/2/0/5/5/12v_on.jpg

From here you can cut and splice in your wiring to power your accessories. Your power tap will remain hidden behind the console panel and if you choose to you can still retain the use of your 12v accessory plug.

On this same side we will connect our black ground wire. You will see a metal frame member plainly visible with two studs and two nuts. Both of these provide a good grounding location. A 10mm metric socket is needed to remove the nut. And a 14-16 gauge clamp on ring will work well here.
http://cobaltss.net/gallery/files/2/0/5/5/12v_ground.jpg

http://cobaltss.net/gallery/files/2/0/5/5/12v_ring.jpg

If you need a 12v switched source (only on when key is in the accessory or run position) go over to the passenger console side panel. Behind this panel is one of the fuse panels on the car. On the panel itself is a diagram of which fuse controls what and its rating. I chose to use the sun roof fuse. To get power out of the fuse while the fuse is inserted we will need a power tap. Simply slide it over one and up of the blades on the fuse, then insert back into the fuse panel. Now we have a easy connection point for a 14-16 gauge quick connector.
http://cobaltss.net/gallery/files/2/0/5/5/12v_powertap.jpg

http://cobaltss.net/gallery/files/2/0/5/5/12v_connect.jpg

http://cobaltss.net/gallery/files/2/0/5/5/12v_switched.jpg

Tip: On the fuse block itself is a long white tool for removing fuses. Its below the red portion with all the wires and is also noted on the fuse panel diagram.

[MGM1979]

http://www.innovatemotorsports.com/forums/showthread.php?t=3410

[MGM1979]

So, got everything in and working...went to dial in the offsets in HPT, but the AFR continues to creep richer by .01 about every 5-10 seconds (this is running at 185 F or so).

I'm not so sure it's the offset issue as it is the car and/or the injectors (60#)...too much flow, even at idle, for the car to cut enough fuel back to keep it from going richer :shrug: ???

So, in the next day or so, I'm gonna check the AFR in logworks, to make sure I'm seeing the same numbers (so as to rule out the offset issue) - we'll see.

offset averages/spreadsheet
http://www.hptuners.com/forum/showthread.php?t=10001&highlight=lc-1+offset