2000 Chevy Silverado LT, 5.3 Vortec
Nelson Tune
Whipple blower with stock pulley

Throwing two codes,

1) P0102 - MAF/VAF circuit low
2) P0327 - Knock Sensor circuit (something like that)

Any insight anyone please?

California Smog now requires that any OBDII automobiles not have their SES light on during smog (according to the smog guy). I used to just hook up the scanner and dump the codes...

 

Are you using whipples electronics?

The SE light is everywhere with OBD 2 inspection

 

No whipple computer,

using nelson tune...

 

I got that same MAF code when I had some water in my intake tube.
After I cleaned and dried the MAF out it finally cleared.
Any chance you have some moisture in your intake or maybe oil from your filter?
You didn't really say what you did just before this happened.

 

Could anyone tell me where to find the wire connector for the knock sensor on the back of the intake manifold on the Vortec 5.3L?

Thanks,

 

When you find the knock sensor harness, unplug it and gram an ohmmeter and test each sensor. They should be right at 100K ohms. If one is less than that you will have to replace it. Put one probe on the pin from the connector and the other try to touch the valley cover.

The plug for the knock sensors is on the back of the intake manifold by the firewall, and it has a little metal clip that holds it to the manifold. I think I posted in your other thread, but check out the Radix install instructions. They tell you how to pull the manifold and somewhere in there are pics of unplugging the knock sensors.

http://www.magnacharger.com/pdf/manu...SUV1999-02.pdf

 

Awesome reply Thunder550, that's exactly what I was looking for...

Thank you

 

Glad I could help