System Readiness Tests
I need to smog my '01 Silverado soon, but my system readiness tests won't complete. I put in a new tune a week ago so I expect them to take awhile, but I've done about 15 drive cycles since and two are still "Not Ready". Here is what the report said this morning:
My tune is a stock tune with some adjustments for e-fans, gearing/tire size, desired idle speed and desired idle airflow, and some DTC's switched off for the 4L60E to T56 swap I did. I'm running a 4L60E tune because I can't do a manual segment swap without changing operating systems.
I am also using a 160* thermostat, which runs at 167-170 pretty much whenever I'm moving. Could this not be warm enough for the catalyst and heater O2 sensor tests? I read on another forum that 180* is required for some of the tests to complete.
Here is the "GM Drive Cycle": http://www.lyberty.com/car/drive-cycle.html
I'll try step 2 this afternoon to see if I get the heated O2 sensor to test to complete.
As for the catalyst test in step 7, I never drive 55mph for 5 minutes straight. And frankly, I can't think of anywhere around here to do that.
Are there any PID's I can log in order to see that the tests are currently being executed?
Reply With Quote