I'm getting some strange BLM readings on both sides of the engine. At slower speeds/rpm the more "off" 128 they get.

Right now at around 1-2000 rpm at slower speeds I get around 114-118.
At 2000-3000 rpm its around 118-122
Above 3000 it seems to get closer to 128.

+- 4 or so doesnt bother me much but for the majority of my city driving its too low and something seems wrong.

I have brand new O2's, new Opti and plugs and IAT sensor. Any ideas as to what could cause this? I'm leaning towards MAF or Injectors...

 

Ttt

 

Thats not too far off, when my tune was off i was getting anywhere from 108's to 140's.



Chris

 

Anyone else have any opinions? I should add that I'm nearly stock with just intake and exhaust upgrades with a lot of things replaced on the car in the last 2 or 3 years. It should be running like new, but it's not from the readings. Not horrible, but it could be better.

I also have a stumble/flutter I can't fix at slower hwy speeds, when acellerating lightly (happens around 50mph). Wether or not its related I dont know, but i'm hoping that someone would be able to decipher the logged results above.

For some reason at lower speeds its not getting enough air, or its putting in too much fuel. But it's not so bad that its running pig rich, just not as good as it should.

 

That is normal range for BLMs. I wouldn't worry about it.
If you're really that picky, you can play with the MAF tables to get them close to 128.