ScanGauge TPS spike

[FastPlastic]

Picked up a ScanGauge II the other day. After getting it all setup I noticed some odd readings coming from it. The TPS readout at idle spikes to 16 for a half second every now and then. Idle on my Jeep Cherokee has always been just a little ruff. Is it just an error in the readout? or is that whats affecting my idle? I replaced the TPS about a year ago so what else would cause the spike?

I found out the jeep has fuel cutoff for coasting. But it will only do it for a split second, guessing whatever is causing this is preventing it from doing it for an extended period of time.

Any help would be greatly appreciated. Thanks

[MetroMPG]

The fuel cutoff reporting isn't bullet proof on the SG. It's a known issue.

On my car, looking at the "Loop" status is more reliable (goes into open loop under fuel cut).

Don't know anything about the TPS issue.

[Red]

The TPS on the 4.0 is junk. It just getting dirty again. Mines been that way for about a year now no biggie. Sometimes spraying the TB blade and TPS shaft with some TB cleaner helps.