2 systems "Not Ready" to pass inspection - need help

[stumpie]

LS can't pass inspection due to multiple systems "Not Ready"

Evap system
Catalyst

I have known for a bit that my cats are rough, especially at startup when the engine is cold, harsh idle and unresponsive throttle (stupid computer-controlled throttle body). Warms up and everything is fine...

I had recently cleared a Catalyst Inefficiency code, and have since driven over 300 miles without a CEL, but the systems are still "Not Ready" and therefore I can't get me a new sticker. Any suggestions to reset systems? Just a battery disconnect for a few? Will that do, maybe?

 

[LS4me]

I thought it had to be drive "cycles", not necessarily miles.

 

[joegr]

Yep, drive cycles and certain conditions. For example, the evap monitor will not complete until you drive with the gas tank at the right fill levels (I think that 3/4 full is one of them). If you Google it, you should find the right things to do.

 

[stumpie]

Could a faulty fuel level sensor affect these systems in a way that would prevent them from being ready for test? (My gas needle is always between 1-0.5. The tank goes empty at 0.5, right after the needle crashes to E with a "FUEL COMPUTER DATA ERROR" on the message center).

 

[joegr]

Yes.