ScanGauge TPS spike
 

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

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.

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.