What Poorman says is the way to go. You're best bet is to put the Injector Constant and fuel pressure where it belongs and start to work on the MAF table to recalibrate for the Z06. Sorry, I thought you were still running a stock MAF ( I need to read a little closer). If your exhaust leak is back at least 2 or 3 feet downstream from the O2 sensors, I doubt your getting any air reversion that would whack things out.

Steve

 

OK. Well there are 4 MAF tables using tunercat, so do i modify all 4 of them? Also, the exhaust leak on the driv. side is about 8 inches downstream fro the O2 sensor.

 

YGM, the spreadsheet has values for all 4 tables. To be systematic about the whole thing, I would first put the stock MAF on and see what happens before you start changing stuff.

 

Thanks alot. I'll take a peak tonight.

 

An exhaust leak 8" downstream from an O2 sensor would give me some concern at idle and low rpm's. I personally would take care of the leak before I started tuning. Tunes never seem to work out to be a perfect set of numbers for all operating conditions. Adding any uncertainty due to exhaust leaks just makes you scratch your head more in the long run. JMHO

Good luck

Steve

 

I don't know if you've fixed this yet, but check your injector offset vs voltage. This is what got me. I changed my constant, but didn't change this, and it showed.

This won't fix the lean problem that you're seeing, but it will cut back on the fuel and put it where it is supposed to be. If you don't change these, you'll run rich after you find your lean one.

Do a search, there is a table of the offsets vs battery voltage somewhere on this board.

D Moss

 

I never ended up getting that far due to a new project coming up, but yes I think your right. i didnt adjust at all for the inj. offset vs voltage. Thanks for the heads up.

 

You're welcome,

And keep us informed on any and all information that you see. 90% of the time it is the simplest things that get you.

D Moss