EGR pin for '08 corvette
I must be blind but I can not find a pin-out diagram for the '08 conv. corvette for the life of me (pretty sure '08 is has the E38 and it only has 2 main plugs and they are both black). Have looked at many many threads here but they all deal with other years and PCM's. The closest thing I have found is this link for an '07 Z06 but no EGR pin could be found and I'm not sure it is even the same plugs as mine: http://www.ls2.com/forums/showthread...40#post6553040
Help PLEASE! |
So are you looking for the EGR location or just the ECM pinout diagrams? There are no EGR's on the C6's and the 07-08 ECM's do have only 2 connectors.
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I want to wire my wideband 5V output to the ECM (currently using the A/C pressure switch cheat and want to stop that because I am sick of not having heat and a/c). The EGR pin (I know the car doesn't have the sensor but supposidly the pin is still there) is a 5 volt input and wanted to hook it up that way. If there is another way that you guys know of that is any easier than trying to figure out those connectors I am all ears:-)
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Just curious what the EGR signal is good for? I see a few people refer to it as a way to tune but I don't quite understand how.
Jim |
Oops, guess we were typing at the same time. I would like the answer to as I have an LM-1 and have been trying to find a better way to hook up the sensor. Are you saying that through the EGR pinouts your can get an accurate wideband reading without using a sensor? Please educate me!
Jim
Originally Posted by ktoonsez
(Post 1568423132)
I want to wire my wideband 5V output to the ECM (currently using the A/C pressure switch cheat and want to stop that because I am sick of not having heat and a/c). The EGR pin (I know the car doesn't have the sensor but supposidly the pin is still there) is a 5 volt input and wanted to hook it up that way. If there is another way that you guys know of that is any easier than trying to figure out those connectors I am all ears:-)
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Originally Posted by Corpsvette
(Post 1568423226)
Oops, guess we were typing at the same time. I would like the answer to as I have an LM-1 and have been trying to find a better way to hook up the sensor. Are you saying that through the EGR pinouts your can get an accurate wideband reading without using a sensor? Please educate me!
Jim |
Originally Posted by ktoonsez
(Post 1568423132)
I want to wire my wideband 5V output to the ECM (currently using the A/C pressure switch cheat and want to stop that because I am sick of not having heat and a/c). The EGR pin (I know the car doesn't have the sensor but supposidly the pin is still there) is a 5 volt input and wanted to hook it up that way. If there is another way that you guys know of that is any easier than trying to figure out those connectors I am all ears:-)
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Originally Posted by GMautotech
(Post 1568429006)
I see what your saying, but the software is not going to be in the ECM for monitoring the EGR. The ECM would not 'read' the input.
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Then give pin #55 in the Grey C2 connector a try. That's the EGR position input. But then there might be tuning issues when the ECM thinks there is going to be exhaust gases recirculated through the engine and tries to adjust the A/F accordingly.
http://img.photobucket.com/albums/v2...%202/E38C2.gif |
Originally Posted by GMautotech
(Post 1568436277)
Then give pin #55 in the Grey C2 connector a try. That's the EGR position input. But then there might be tuning issues when the ECM thinks there is going to be exhaust gases recirculated through the engine and tries to adjust the A/F accordingly.
http://img.photobucket.com/albums/v2...%202/E38C2.gif |
I'm not sure on that one.
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If it shows a reading in "Table Display" then it must exist, right? or it would say "unsupported parameter". This is an 05 E40.
http://i160.photobucket.com/albums/t...0c-5/egr-1.jpg |
I just did some experimentation on this, today, as I'm interested in finding an analog input on the E38, also.
The EGR position signal input is pin #47 on the GREY connector for the 2008 E38. However, you can't just attach a signal to this pin and expect it to be read (and data-loggable) by the ECM because, as was stated above, the EGR routines are all disabled in the Corvette calibration because there is no EGR on this vehicle. By "flipping" this EGR enable bit in the cal, however, the ECM can be made to read and datalog this input. The other issue is, also mentioned above, what side effects may occur as a result of enabling the routines. Some testing on my car is in order. ;-) |
Originally Posted by VinceTrifecta
(Post 1569856463)
The other issue is, also mentioned above, what side effects may occur as a result of enabling the routines.
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Bingo, as 2000C-5 said.
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Originally Posted by VinceTrifecta
(Post 1569856463)
I just did some experimentation on this, today, as I'm interested in finding an analog input on the E38, also.
The EGR position signal input is pin #47 on the GREY connector for the 2008 E38. However, you can't just attach a signal to this pin and expect it to be read (and data-loggable) by the ECM because, as was stated above, the EGR routines are all disabled in the Corvette calibration because there is no EGR on this vehicle. By "flipping" this EGR enable bit in the cal, however, the ECM can be made to read and datalog this input. The other issue is, also mentioned above, what side effects may occur as a result of enabling the routines. Some testing on my car is in order. ;-) Any updates? |
I did this on a 2010 Camaro. I tried pin 47 to no avail. Just before I was about to switch to using the AC method I tried pin 55 on the gray connector for the hell of it and it worked like a charm.
My tuner did have to enable the EGR, but I knew that was necessary before I started. |
bumping... Is it 47 or 55? LS3, 2010. Also there is no EGR enable on my HPT, however there is an EGR map under timing (all zeroed) and I can "log" EGR voltage as zero.
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