Connecting wideband via EGR or A/C Pressure in HP Tuners
05-23-2007, 12:24 AM
#21
Melting Slicks
05-23-2007, 01:16 AM
#22
Drifting
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St. Jude Donor '08
Fuel Pressure Logging and wiring through EGR PCM pinouts.
http://www.holdencrazy.com/EFILive/T...itTutorial.zip is the tutorial that TAQ did.
Autometer Fuel Sending unit 2246
You need the harness as well PN 5223
Here is log showing a big problem with my fuel system
http://www.holdencrazy.com/EFILive/T...itTutorial.zip is the tutorial that TAQ did.
Autometer Fuel Sending unit 2246
You need the harness as well PN 5223
Here is log showing a big problem with my fuel system
06-09-2007, 01:16 PM
#24
Le Mans Master
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Just ordered my LC-1 setup 
Will definitly look into this install approach. I too would opt for the EGR, do like the AC in the heat of the Summer.
By the way, were is the best place to get those pins? Do you need a special crimp tool or do they solder on to the wire?
Thanks for a great how-to
Will definitly look into this install approach. I too would opt for the EGR, do like the AC in the heat of the Summer.By the way, were is the best place to get those pins? Do you need a special crimp tool or do they solder on to the wire?
Thanks for a great how-to
06-13-2007, 10:53 AM
#25
Melting Slicks
Thread Starter
No problem, glad to be of some help!
Sorry I havent gotten around to the A/F error histogram yet. I have been working on getting 2 cars together. As soon as I get a chance I will finish up the sticky. Next I think we need to get a sticky on basic tuning questions and kind of a tuning 101 sticky. LS1tech has us beat on the tuning section, we gotta catch up.
Sorry I havent gotten around to the A/F error histogram yet. I have been working on getting 2 cars together. As soon as I get a chance I will finish up the sticky. Next I think we need to get a sticky on basic tuning questions and kind of a tuning 101 sticky. LS1tech has us beat on the tuning section, we gotta catch up.
06-21-2007, 09:16 AM
#26
Le Mans Master
I did this (WB through AC input) on my '99 and again on my '05. It has worked great for me. I did run into a snag the other day thought. I was doing idle tuning in the parking garage, had the WB ported through the AC so the PCM was not seeing AC pressure. Suddenly I heard a loud hissing from under the hood. Popped it and freon was spewing everywhere. Luckily the C6 compressors are equipped with a pop off valve so that is all that happened but without one there is the potential to seiz up the compressor or blow out a seal. (Not sure about the C5 compressors)
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
06-21-2007, 09:23 AM
#27
Melting Slicks
Thread Starter
Thats why I dont run my AC when logging my wideband.
I did this (WB through AC input) on my '99 and again on my '05. It has worked great for me. I did run into a snag the other day thought. I was doing idle tuning in the parking garage, had the WB ported through the AC so the PCM was not seeing AC pressure. Suddenly I heard a loud hissing from under the hood. Popped it and freon was spewing everywhere. Luckily the C6 compressors are equipped with a pop off valve so that is all that happened but without one there is the potential to seiz up the compressor or blow out a seal. (Not sure about the C5 compressors)
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
06-21-2007, 10:34 AM
#28
Drifting
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St. Jude Donor '08
http://www.eficonnection.com/eficonnection/100w.aspx
I just crimped mine with needle nose pliers and soldered like the picture in the previous post.
06-26-2007, 01:33 PM
#29
Le Mans Master
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Pins can be found at
http://www.eficonnection.com/eficonnection/100w.aspx
I just crimped mine with needle nose pliers and soldered like the picture in the previous post.
http://www.eficonnection.com/eficonnection/100w.aspx
I just crimped mine with needle nose pliers and soldered like the picture in the previous post.
07-01-2007, 12:21 AM
#30
Melting Slicks
You can also go to your local junkyard and open the hood on any late model GM (probably others) and find a connector with the 18 ga pins. I got mine off of a Blazer. I pulled the connector apart, cut the wires about 3" long and the guy at the junkyard just let me have it. There were about 12 in all.
04-10-2008, 05:08 PM
#31
Tech Contributor
I did this (WB through AC input) on my '99 and again on my '05. It has worked great for me. I did run into a snag the other day thought. I was doing idle tuning in the parking garage, had the WB ported through the AC so the PCM was not seeing AC pressure. Suddenly I heard a loud hissing from under the hood. Popped it and freon was spewing everywhere. Luckily the C6 compressors are equipped with a pop off valve so that is all that happened but without one there is the potential to seiz up the compressor or blow out a seal. (Not sure about the C5 compressors)
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
I did some digging and found the TSB about the '05's and early '06's AC systems being overfilled at the factory at 1.4# of 134. After numerouse complaints of the AC not working right (because the AC pressure was getting too high and the compressor was not engaging) they lowered the factory fill to 1.1#.
So I think this may be isolated to C6's affected by that TSB, but it is important to keep in mind that your AC is running unchecked when you have the AC pressure signal bypassed. It may be worth going through the extra work to put a wire on the un-used EGR pin.
Is the wiring the same for 05 as this thread?
Thanks!
04-10-2008, 10:08 PM
#33
Tech Contributor
Hey Joe, here is the '05 specific wiring info you need: http://forums.corvetteforum.com/show...wiring+diagram
Did you tap in at the ECM or did you tap in at the AC switch (which appears to be readily accessable)?
04-11-2008, 02:46 PM
#35
Tech Contributor
Hey Bill.....
Any chance you'd send me your .cfg file so I don't have to go through the brain damage of creating the pid & histogram and all that stuff? Been fooling with it for a while and my head is spinning..
joegut at gmail .com
I'd owe you one if you could!
Any chance you'd send me your .cfg file so I don't have to go through the brain damage of creating the pid & histogram and all that stuff? Been fooling with it for a while and my head is spinning..
joegut at gmail .com
I'd owe you one if you could!
04-20-2008, 10:06 AM
#38
Tech Contributor
We finally got this to work, thanks a bunch for the instructions guys!
THERE WERE A FEW THINGS NOT CLEAR TO US IN THE POSTS ABOVE - HERE IS WHAT WE ENDED UP DOING TO MAKE IT WORK, PERHAPS THIS WILL HELP SOMEONE.
The last bullet in 2000-c5's post was our main snag...we missed that the first time.
We got our custom pids in no problem just as described above, EXCEPT we listed our custom AFR pid as Sensor: Air Fuel Ratio and Units :1. [The picture above shows Sensor: Volts and Units: AFR - that didn't work for us.]
The % error custom pid was easy, leave the Sensor field blank and choose % for the and Units, and copy and paste the formula from 2000-C5's post above.
We our custom Pids in the table, but it kept saying unsupported parameter for our custom pids.
Once we re-opened the table and put in our custom PIDs, AND the AC Pressure (V) pid in the table and the Air Fuel Ratio Commanded Hi Res...(these included PIDS are included under System, AC System and Fuel System, respectively) it worked perfectly!!
We then opened our scanning chart, right clicked on the AFR line, and chose our custom AFR Pid we made, and that works perfecly.
We then opened the Histograms, click on the customization icon next to table 12, clicked on the VE AFR error histogram and chose our custom AFR Error PID we put in, and viola, we're logging AFR actual/commanded errors!
We noticed our LC1 had a slight voltage drop compared to our XD-16 Gauge - we used +9.6 instead of +10 in the custom AFR PID we made, and then the HP Tuners scan matched the gauge almost perfectly.
Hope this last little bit of info will save someone the hour we spent trying to figure that out!
THERE WERE A FEW THINGS NOT CLEAR TO US IN THE POSTS ABOVE - HERE IS WHAT WE ENDED UP DOING TO MAKE IT WORK, PERHAPS THIS WILL HELP SOMEONE.
The last bullet in 2000-c5's post was our main snag...we missed that the first time.
We got our custom pids in no problem just as described above, EXCEPT we listed our custom AFR pid as Sensor: Air Fuel Ratio and Units :1. [The picture above shows Sensor: Volts and Units: AFR - that didn't work for us.]
The % error custom pid was easy, leave the Sensor field blank and choose % for the and Units, and copy and paste the formula from 2000-C5's post above.
We our custom Pids in the table, but it kept saying unsupported parameter for our custom pids.
Once we re-opened the table and put in our custom PIDs, AND the AC Pressure (V) pid in the table and the Air Fuel Ratio Commanded Hi Res...(these included PIDS are included under System, AC System and Fuel System, respectively) it worked perfectly!!
We then opened our scanning chart, right clicked on the AFR line, and chose our custom AFR Pid we made, and that works perfecly.
We then opened the Histograms, click on the customization icon next to table 12, clicked on the VE AFR error histogram and chose our custom AFR Error PID we put in, and viola, we're logging AFR actual/commanded errors!
We noticed our LC1 had a slight voltage drop compared to our XD-16 Gauge - we used +9.6 instead of +10 in the custom AFR PID we made, and then the HP Tuners scan matched the gauge almost perfectly.
Hope this last little bit of info will save someone the hour we spent trying to figure that out!
Last edited by Joe_G; 04-20-2008 at 10:12 AM.
The following users liked this post:
c5golfguy (07-24-2018)
I gotta learn this stuff! 
tuning engine with a/c? 
wow! 
04-24-2008, 11:30 AM
#40
Le Mans Master
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I found your thread and another one like it for LT1's on the Z28 forum. I'll be using them to try this on my C4 with Datamaster TTS. Thanks! I'm already logging and doing basic tuning. Having the WBO2 will be nice. I think I'm going to try and use the EGR sensor if it's still 0-5v since I deleted the EGR system. Anyone using an LM1 for both the stock O2 PCM readings and wideband readings going thru EGR or AC to a data logger. I found a similar write up below.
http://www.thend.org/~mkane/Corvette/wbo2.html
I'm already logging and doing basic tuning. Having the WBO2 will be nice. I think I'm going to try and use the EGR sensor if it's still 0-5v since I deleted the EGR system. Anyone using an LM1 for both the stock O2 PCM readings and wideband readings going thru EGR or AC to a data logger. I found a similar write up below.http://www.thend.org/~mkane/Corvette/wbo2.html