RAFIG on 2002 Z06

[Kevin Doe]

Today I found out that the long term and short term IAC trims are not valid on a vette. After some frusturation, I realized its because they don't have an IAC, they have ETC. Looks like since the throttle is electronically controled, the traditional IAC functionality is just built into the throttle opening itself.

So, is there some sort of other way of logging idle trims (for the ETC?) to set desired airflow table? I searched and didn't find any information on here or LS1tech.

Any help is appreciated.

Right now I'm doing some interesting tuning. First my friend dyno'd the Z06 bone stock. Now I'm working on a tune with a vararam only. He'll dyno that to see what it gains. Then he's got some LG exhaust parts he's going to install. So I'll retune with that and dyno again. I think it will be pretty cool see what gains he gets with each one, and more importantly, what tuning changes had to be made to get the tune right for each change.

[SOMhaveit]

I'd do it the same way. All of the IAC info must be working the throttle blade to add idle air in steps. I see that the IAC area is larger on the Z06 than the F-body to account for using the throttle opening to control it instead of the IAC motor and separate opening.

[Kevin Doe]

I think you missed the point, the long term idle trim, and short term idle trims are not supported PIDs for the 02 Vette.

Anyone?

[Robbie The Wrench]

I have a 02 Vette and those pid's are available to me. I would try to pull up the pid selection page again, right click the pid that is unsupported to find out why. Sometimes you need other pid's active to make others work.

Hope this helps:cheers:

[joecar]

Did you do Edit->Validate PIDs...?

[Kevin Doe]

Joe,

I did the edit, validate PIDs. It still came up unsupported. Then I disconnected the EFI live, and tried again. Still unsupported. I also right clicked the PID and it did not give any explanation why they were unsupported. I'm stumped.

[jfpilla]

Is this what you're looking at?

[Kevin Doe]

Yes, those are the PIDs I'm trying to select. Not sure whats going on.

[jfpilla]

As you can see I have a 2003 Vette. As long as I select all of them they work fine for me. So it's not a C5 problem.

[PRAY]

I can't get it to work on an 02 Z06 either.

[joecar]

What OS and engine calibration id's do you all have...?

[jfpilla]

OS: 12221588
OS ID: AC
Cal: 12577176
BCC: YCJR

Everything you might want to know.

Don't mean to offend, but jic, all are being selected at one time?

[PRAY]

I have the COS3 now. I don't remember what the original was off the top of my head. But I know it was from an 03 Z06 bucause of the column lock issue.

[Kevin Doe]

I was corrected by the owner of the car. Its a 2003 C5Z.

OS: 12593358
Cal: 12580402

[Kevin Doe]

I uninstalled my EFI Live software, reinstalled and updated to the newest versions. The short term adn long term idle trims still show up as unsupported on this 2003 Z06.

I've tried to validate the PIDs many times, and it never helps. Any thoughts?

[Kurtomac]

i was having that issue with my stock 02 OS...changed to another 02Z06 operating system and it fixed the problem...same os as jfpilla....dc_justin helped me find this out (hes a efilive instructor)

[Highlander]

Dito.. change the OS.

[Kevin Doe]

Interesting. I listed my OS a few posts up in post # 14. What OS should I change to? What about if I change the the appropiate COS, will that work? Or should I change to a different stock OS first, then change from that to the COS? Thanks for the help so far guys!

[joecar]

If you have the 512KB PCM then you could try 12212156 from a 2002 M6 F-car, if you haven't already...

I seem to remember tho that you have the 1MB PCM...?

[Kevin Doe]

Joe, this is not for my personal car, its for a friends car that has a 2003 Corvette Z06. Is the OS you listed compatible with the stock 2003 Z06 PCM?

[joecar]

I don't know about 2003... if it's a 512KB PCM then it would be.