New wideband bouncing around and reading erratic on VCM scanner

[SiskMan]

Hello everyone,

This is my first post on this forum and look forward to learning to tune my 2000 LQ4 swapped WS6.

So, i bought HP Pro and an AEM 30-4110 wideband on amazon. I hooked up the wideband and it seems to work just fine at idle. It reads really steady 14.5 - 14.9 or so moving around a little bit here and there. However, when driving around it jumps around from 13.8 to 15.1 or so. The little guage light looks like a fast moving ping pong ball bouncing back and forth between these values. It never stays steady at all when driving around.

Also, when I plug in the wideband to the HP pro box, the readings are just as erratic but at a much faster rate. It looks like an earthquake reading on a seismograph.

Ive done searches and havent been able to find much. The wideband is screwed into a bung on the header collector and the ground is screwed on a metal bracket under the dash/steering wheel.

What is causing this? Any thoughts?

[5FDP]

Sounds all normal to me.

If you watch narrow bands, they bounce between 50mv to 900mv as a normal function. You are just seeing that with the wideband now.

[SiskMan]

Ok thank you. Im just trying to make sure i have everything set up correctly. I appreciate the response.

[Jay@HAP]

You might need to change the sample rate if it's that erratic in HPT.

[jimmyblue]

My wideband has a filtering option which can be set to
bare (bouncey) or several averaging values. Check your
docs / control app for this. You don't want too smooth,
it can bury transient fueling details that you may care
about. Best to take real data and filter later, in my
book.

[SiskMan]

My wideband has a filtering option which can be set to
bare (bouncey) or several averaging values. Check your
docs / control app for this. You don't want too smooth,
it can bury transient fueling details that you may care
about. Best to take real data and filter later, in my
book.

Ok ill try and see if i can figure out whats going on. On the main table in VCM Scanner, the number is just a blur between 13-15. I can't tell what it is at all because it is changing so fast. That seems wrong to me

[07GTS]

make sure the signal earth from the wideband goes to the earth on the hptuners eoi input also, i had a fuel pressure input and it was flat out squiggly lines until i earthed it straight to the input also and not just to the body earth where it can get interference