Originally Posted by
kenand1988
Theres no modifications to it. Everything is stock. Here is a list of the maintenance I have done.
1. Oil change
2. Cleaned air filter
3. Resealed all fuel injectors, top and bottom seals.
4. Cylinder compression check, all within 5psi of each other 177-182 psi
5. New sparkplugs
6. New wiresets
The MAF is right by the air filter so all its doing is taking a frequency and referencing it to the maf table which I haven't changed. A vacuum leak would show up in driving, idling, fuel trims. Theres no boost leak, it hits 10-10.5 psi consistently every pull. I'm far beyond 530 g/s more like 630 g/s. but again thats just what the stock system says its doing at X frequency. I've never even removed the MAF, could it be bad? I doubt that unless it only shows up when at a high frequency but there isnt anything wonky going on when looking at the logs, they are smooth. So, the only explanations are the maf table is off, on the rich side or a stock z06 makes what a highly modified z06 does lol OR i guess the MAF could be bad.That would also explain a much higher reading than is normal but would MAF fail consistently making the fuel system 20% rich at WOT, I doubt it. The wideband is totally separate from the ECU so they dont have anything to do with one another. To me this looks like the MAF is 20% rich, I would think this is because it has no widebands so it has to be that way so it will never be lean no matter the DA. DA tonight was like mid 300s btw. Setting up on the dyno would be the only real way to tell the health overall of the car and the stock tune.