BigKID

iTrader: (5)

I would look more in to this (bold in quote). If map is steady and the calculated airflow drops, I suspect there is hole in a MAF table or the MAF itself is bad. You could also check all the plumbing behind the MAF to make sure there are no leaks. Are you injecting anything pre-maf such as meth or nitrous?

Mr_Safety

iTrader: (2)

Not running meth or nitrous. I have another maf that I am going to put on to see if it will fix it but it has been work fine up till now so I bet there is a issue in the maf tune.

Mr_Safety

iTrader: (2)

well took the tune from the 2005 and copy and pasted it to my tune and did a write intire instead of a calibration only. It fixed the problem for the most part. I still had to put a maf tune from my buddys 03 ss silverado with a mp112. It was still a little lean but was not just suddenly droping like before. After i did the maf tune it is almost perfect just needs a little fine tuning. Thanks for all the responses and help.

1FastBrick

iTrader: (17)

Did you have to scale the injectors for the Return style fuel system?

I believe that's one of the small differences.

Mr_Safety

iTrader: (2)

My friend wrote the tune for me and he said he didn't have to touch it for some reason it wasn't set for return less but it did have 37# injectors. He just left those values in there for now and overall it was looking pretty good. Around 11.5 on the wide band with zero knock. So with a little bit more fine tuning it should be good to go.

Mr_Safety

iTrader: (2)

I was wrong it was 39# injector values

1FastBrick

iTrader: (17)

I think... If I remember correctly...

On the 99-03 Return style, the value is constant as the vacuum regulates the pressure.

On The 04-up return Less style the value increase as the MAP value increases or something like that since the fuel pressure remains the same.

Mr_Safety

iTrader: (2)

ya your right i meant to say it was set for return style. It was set to 39# across the whole table instead of increasing.