VCM Scanner Wideband Readings Fluctuate Very Rapidly

[aka.LocK]

Hello,

Recently installed a 30-0300..

AEM Red extended to fuse 22 with 5amp fuse for switched
AEM Black was to chassis on driver sides at ground (G201), but went right to battery to test
AEM white to Prolink Red twisted together
AEM Brown to Prolink Black twisted together

Added to scanner under mpvi3 > prolink > input 1 Red
Transformed to o2 > air fuel > AEM 30 (03x0, 2340, 5130)

My gauge seems to read ok, but when i record in the scanner the voltage and the AFR readings vary wildly and very fast between 13-17 cant even tell what its at in real time trying to compare to gauge, noticing others recordings of scanners in videos it seems not normal. When recording voltage follows a similar pattern for input 1.

Attached is a short log file and a cell phone video recording in real time just idling (not the same as the attached log, but visually the same).

Any ideas? Is that normal? Exhaust leak?

2004 vette - t56 - intake, long tube kooks and exhaust only mods - no cats.

OEMBaseMod.hpt
7625.hpl
https://streamable.com/u14ba3

[danieltexpd]

Hello,

Recently installed a 30-0300..

AEM Red extended to fuse 22 with 5amp fuse for switched
AEM Black was to chassis on driver sides at ground (G201), but went right to battery to test
AEM white to Prolink Red twisted together
AEM Brown to Prolink Black twisted together

Added to scanner under mpvi3 > prolink > input 1 Red
Transformed to o2 > air fuel > AEM 30 (03x0, 2340, 5130)

My gauge seems to read ok, but when i record in the scanner the voltage and the AFR readings vary wildly and very fast between 13-17 cant even tell what its at in real time trying to compare to gauge, noticing others recordings of scanners in videos it seems not normal. When recording voltage follows a similar pattern for input 1.

Attached is a short log file just idling. Any ideas?

2004 vette - t56 - intake, headers and exhaust only mods - no cats.

OEMBaseMod.hpt
7625.hpl

I'm having the same issue... Wired correctly...Gauge reads great, but I can't make heads or tails of the scanner reading either.... I have an AEM 30-0400.


Hope someone chimes in with some input.