Getting tired of sometimes having power and sometimes not, so im doing some tests. No codes shown before I unplug MAF, and no old codes either. When I unplug it my idle gets smother and a lot more pull. Idle is pretty smooth to begin with but just overall seams smoother w no MAF. I know I need to try a known good one. Also, I have logged it and seams im running lean w MAF plugged in. Haven't ran a log w it unplugged yet.

 

Did you try cleaning the MAF.

Is it "ported" atall?

 

First thing i did. A few times actually.

 

You might want to see if it's really associated with the MAF or closed loop operation. Plug the MAF back in and unplug an O2 sensor. If it runs better look beyond the MAF

 

Well seams like no power is back. And its hit miss. When i have full power, idle gets a lil smoother. All wires are good and no arking. It seams if i reset pcm. i have power for a lil bit.

 

Is it possible you have a tear in the intake elbow, or the elbow is not fully seated on the bottom of the throttle body? It's either that, or the MAF is not measuring the air flwoing through it accurately.

 

Doubble checked that also. All is good. Next is a known good maf.

 

I have a spare MAF sensor, GM original, let me know if your in need.

 

Hey thanks! Im gunna swap a friends maf for a day. I also just fund a reciept for two new Bosh o2s and bet thats were some of my problems comming from.

 

Update. It finally got worse and kicked a code. left o2 running lean. I also looked at it on data master. That o2 goes to 193 and stays there.

 

I would get rid of the Bosh O2s,my car would not run at all with them installed..Then again some people have had no problems with them..I guess its the luck of the draw..

 

this

 

Its almost undrivable till it throws the o2 code, then its a lot better but no power. Ordering Delphi o2s tomorrow.

 

i just noticed an exh leak at collector. I have longtubes and thats very close to the o2. When I used free scan, left bank was at 193, but when i reved it it went back to normal for a sec. Voltage seams fine so im betting a leak.