Shon Herron

iTrader: (25)

'06 express van 6.0/4l80e. original comes with a very small MAF, I didn't want to use that in my swap so for the time being I set it up to run SD and its been awesome for 8+years probably. Well, finally getting around to make a 'CAI' set up and going to add the MAF back using a truck MAF, ie its 5 wires and larger than the van one.
I have the IAT working thru the maf, it reads correctly. That leave a 12v, ground, and MAF signal.
C should be ground, D is 12v and E is
the signal to pin 31 on green side of PCM.
I have verified I have 12v going thru C. Its grounded. but no reading in HPTuners scanner for MAF hz.

I have tried 3 different MAFs, one off a known running truck. all the same results.

What am I missing@?@?

Russ K

iTrader: (1)

On the 2006 Van, this is the Maf wiring pin outs;
A Maf signal pin 31
B 12V
C Ground
D IAT signal pin 25
E Low reference pin 57

On the 2006 pick-up;
A Low reference pin 57
B IAT signal pin 25
C Ground
D 12V
E Maf signal pin 31

Russ Kemp

Shon Herron

iTrader: (25)

It should read some values even if in SD mode. I have the tune to fail at 0hz. But should still show airflow. The P codes are set to fail on first.
I have turned MAF to 14000 hz and still nothing.

Thinking I will wire back in the express van MAF and see if it shows anything. Don't see how that will change anything.

Any other ideas?

Russ K

iTrader: (1)

Why not just wire the Maf correctly as I posted above?

Russ Kemp

Shon Herron

iTrader: (25)

B/c I have and it shows no MAF signal.

Shon Herron

iTrader: (25)

I determined the connector I bought was defective in some way b/c I wores in the van MAF and it works.
Not what I wanted but tired of messing with it.